{"id":5822,"date":"2024-09-20T20:51:54","date_gmt":"2024-09-20T11:51:54","guid":{"rendered":"https:\/\/mightyfriend.net\/?p=5822"},"modified":"2024-11-24T11:13:27","modified_gmt":"2024-11-24T02:13:27","slug":"boardgame-dobble-principle","status":"publish","type":"post","link":"https:\/\/mightyfriend.net\/?p=5822","title":{"rendered":"\ub3c4\ube14\uc5d0 \uc228\uaca8\uc9c4 \uc218\ud559 \uc6d0\ub9ac\ub97c \ucc3e\uc544\uc11c"},"content":{"rendered":"<p>\ub3c4\ube14\uc774\ub77c\ub294 \ubcf4\ub4dc\uac8c\uc784\uc5d0 \uc228\uaca8\uc9c4 \uc218\ud559 \uc6d0\ub9ac\ub97c \uc81c \ub098\ub984\ub300\ub85c \uacf5\ubd80\ud55c \uacb0\uacfc\ub97c \uc815\ub9ac\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">List of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\ubaa9\ucc28 \ud1a0\uae00\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#1_%EB%93%A4%EC%96%B4%EA%B0%80%EA%B8%B0\" >1. \ub4e4\uc5b4\uac00\uae30<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#2_%EA%B8%B0%EB%B3%B8%EC%98%88%EC%A0%9C\" >2. \uae30\ubcf8\uc608\uc81c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#3_%EC%B6%94%EA%B0%80%EC%98%88%EC%A0%9C\" >3. \ucd94\uac00\uc608\uc81c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#4_%EC%9A%A9%EC%96%B4%EC%A0%95%EC%9D%98_%EB%B0%8F_%EC%88%98%EC%8B%9D\" >4. \uc6a9\uc5b4\uc815\uc758 \ubc0f \uc218\uc2dd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#5_%EC%98%88%EC%A0%9C_%EB%8D%94_%EC%95%8C%EC%95%84%EB%B3%B4%EA%B8%B0\" >5. \uc608\uc81c \ub354 \uc54c\uc544\ubcf4\uae30<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#6_%EA%B7%B8%EB%9E%98%EC%84%9C_%EB%8F%84%EB%B8%94%EC%9D%B4%EB%9E%91_%EC%96%B4%EB%96%BB%EA%B2%8C_%EC%97%B0%EA%B2%B0%EB%90%98%EB%82%98%EC%9A%94\" >6. \uadf8\ub798\uc11c \ub3c4\ube14\uc774\ub791 \uc5b4\ub5bb\uac8c \uc5f0\uacb0\ub418\ub098\uc694?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mightyfriend.net\/?p=5822\/#7_%EC%A2%80_%EB%8D%94_%EC%83%9D%EA%B0%81%ED%95%B4_%EB%B3%BC%EA%B1%B0%EB%A6%AC\" >7. \uc880 \ub354 \uc0dd\uac01\ud574 \ubcfc\uac70\ub9ac<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"1_%EB%93%A4%EC%96%B4%EA%B0%80%EA%B8%B0\"><\/span>1. \ub4e4\uc5b4\uac00\uae30<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\uc5b4\ub5a4 \ubcf4\ub4dc\uac8c\uc784\uc744 \ud588\ub294\ub370 \ub300\ub7b5\uc801\uc778 \uac8c\uc784 \ubc29\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. \ucd1d 7\uba85\uc758 \uce90\ub9ad\ud130\uac00 \uc788\ub294\ub370 \uc8fc\uc0ac\uc704\ub97c \uad74\ub824\uc11c \ub098\uc628 \ub208 \ub9cc\ud07c \uce90\ub9ad\ud130 \ud558\ub098\ub97c \uace8\ub77c \uc6c0\uc9c1\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\ub978 \uc0ac\ub78c\ub3c4 \uac19\uc740 \ubc29\uc2dd\uc73c\ub85c \uc9c4\ud589\ud558\uace0 \ubaa8\ub4e0 \uce90\ub9ad\ud130\ub97c \uc120\ud0dd\ud574\uc11c \uc6c0\uc9c1\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uce90\ub9ad\ud130 \uc0c9\uae54\uc740 \ubb34\uc9c0\uac1c \uc0c9\uae54\ub85c \ube68\uac15, \uc8fc\ud669, \ub178\ub791, \ucd08\ub85d, \ud30c\ub791, \ub0a8\uc0c9, \ubcf4\ub77c \uc774\ub807\uac8c \uc788\uc2b5\ub2c8\ub2e4. \uce74\ub4dc\ub97c \uc798 \uc11e\uc5b4\uc11c \ud55c \uc7a5 \ub098\ub220\uc8fc\ub294\ub370, \uac70\uae30\uc5d0 3\uba85\uc758 \uc0c9\uae54 \uce90\ub9ad\ud130\uac00 \uadf8\ub824\uc838 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc81c \ub098\uc758 \ubbf8\uc158\uc740 \uc774 3\uba85\uc744 \ucd5c\ub300\ud55c \ub9ce\uc774 \uc774\ub3d9\uc2dc\ud0a4\ub294 \uac83\uc785\ub2c8\ub2e4. \ub0b4\uac00 \uc5b4\ub5a4 \uce90\ub9ad\ud130\uc778\uc9c0 \uc228\uae30\uace0 \ubab0\ub798 \uce90\ub9ad\ud130\ub97c \uc804\uc9c4\uc2dc\ucf1c\uc57c \ud558\ub294 \uac8c\uc784\uc785\ub2c8\ub2e4.<\/p>\n<p>\uadf8\ub7f0\ub370 \ub2e4\ub978 \uc0ac\ub78c\ub3c4 \uce74\ub4dc\ub97c \ud55c \uc7a5 \ubc1b\uc744 \uac83\uc774\uace0 \uac70\uae30\uc5d0\ub3c4 3\uba85\uc758 \uc0c9\uae54 \uce90\ub9ad\ud130\uac00 \uadf8\ub824\uc838 \uc788\uaca0\uc8e0. \ub610 \ub2e4\ub978 \uc0ac\ub78c\ub3c4 \ub9c8\ucc2c\uac00\uc9c0&#8230; \uadf8\ub7f0\ub370 \ucd1d 7\uc778\uae4c\uc9c0 \ud560 \uc218 \uc788\uc73c\ub2c8\uae50 7\uc7a5\uc758 \uce74\ub4dc\uac00 \uc788\uc2b5\ub2c8\ub2e4. <span style=\"color: #0000ff;\">\uc5ec\uae30\uc11c \uc911\uc694\ud55c \uc810\uc740 \uce74\ub4dc\ub97c \uc5b4\ub5bb\uac8c \ubd84\ubc30\ud558\ub354\ub77c\ub3c4 \uc11c\ub85c \uacb9\uce58\ub294 \uc0c9\uae54\uc758 \uce90\ub9ad\ud130\uac00 \ubc18\ub4dc\uc2dc \ud55c \uc0c9\uae54\uc774 \uc788\uace0, \ub098\uba38\uc9c0 \ub450 \uc0c9\uae54\uc740 \uacb9\uce58\uc9c0 \uc54a\ub294\ub2e4\ub294 \uc810\uc785\ub2c8\ub2e4.<\/span> (\ubc18 \ud611\ub825\uc774 \ub420\uc9c0\ub3c4?)<\/p>\n<p>\uc800\uc758 \uc758\ubb38\uc758 \uc2dc\uc791\uc810\uc774 \ubc14\ub85c \uc5ec\uae30\uc785\ub2c8\ub2e4. \uc5b4\ub5bb\uac8c \ud558\uba74 \uce74\ub4dc\ub97c \uc774\ub807\uac8c \ub9cc\ub4e4 \uc218 \uc788\uc744\uae4c\uc694? \uadf8\ub9ac\uace0 \uace7 \uc774\uac83\uc774 \ub3c4\ube14\uc774\ub77c\ub294 \ubcf4\ub4dc\uac8c\uc784\uacfc \uc6d0\ub9ac\uac00 \ub611\uac19\ub2e4\ub294 \uac83\uc744 \uc54c\uac8c \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \ucd1d 7\uc7a5\uc758 \uce74\ub4dc\uc5d0 3\uac00\uc9c0 \uc0c9\uae54\uc774 \uadf8\ub824\uc838 \uc788\uace0 \uc11c\ub85c \ub2e4\ub978 \uce74\ub4dc \ub450 \uc7a5\uc744 \ube44\uad50\ud558\uba74 \ubc18\ub4dc\uc2dc \uac19\uc740 \uc0c9\uae54\uc774 1\uac1c \uc788\ub294 \uac83\uc774\uc8e0. \ubbf8\ub2c8 \ub3c4\ube14\uc778 \uc148\uc785\ub2c8\ub2e4. \uc77c\ub2e8 \uc774\uac83\uc5d0 \ub300\ud55c \ub2f5\uc744 \ub9cc\ub4e4\uc5b4 \ubcf4\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_%EA%B8%B0%EB%B3%B8%EC%98%88%EC%A0%9C\"><\/span>2. \uae30\ubcf8\uc608\uc81c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div id=\"attachment_5825\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5825\" loading=\"lazy\" class=\"wp-image-5825\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/731_0.png\" alt=\"\" width=\"320\" height=\"187\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/731_0.png 769w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/731_0-300x175.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/731_0-624x364.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5825\" class=\"wp-caption-text\">(7, 3, 1) \uc608\uc81c<\/p><\/div>\n<p>\uc5ec\uae30\uc11c 1, 2, 3, 4, 5, 6, 7 \uc774 \uac01\uac01 \ube68, \uc8fc, \ub178, \ucd08, \ud30c, \ub0a8, \ubcf4 \uc774\ub807\uac8c \uc0dd\uac01\ud558\uba74 \ub429\ub2c8\ub2e4. \uc989 7\uc885\ub958(v)\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uce74\ub4dc \uc7a5\uc218 7\uc7a5(b)\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uadf8\uac83\uc744 B1, B2, &#8230;. , B7\uc73c\ub85c \ud45c\ud604\ud558\uc600\uc2b5\ub2c8\ub2e4. \uce74\ub4dc\ub9c8\ub2e4 3\uac1c\uc758 \uc0c9\uae54(k)\uc774 \uadf8\ub824\uc838 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc81c \uc784\uc758\uc758 \uce74\ub4dc \ub450 \uc7a5\uc744 \ubf51\uc544 \uc11c\ub85c \ube44\uad50\ud574 \ubd05\uc2dc\ub2e4. \uc608\ub97c \ub4e4\uc5b4 B2 \uce74\ub4dc(\uc8fc, \ub178, \ud30c)\uc640 B6 \uce74\ub4dc(\uc8fc, \ub0a8, \ubcf4)\ub97c \ube44\uad50\ud574 \ubcf4\uba74 \uc11c\ub85c \uc8fc\ud669\uc0c9\ub9cc \uacf5\ud1b5\uc73c\ub85c \ub4e4\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc784\uc758\uc758 \ub450 \uc7a5\uc758 \uce74\ub4dc\ub97c \uac00\uc838\uc624\ub354\ub77c\ub3c4 \uc774\ub7f0 \uc2dd\uc73c\ub85c \ub531 \ud55c \uc0c9\uae54\ub9cc \uacb9\uccd0 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \ube14\ub85d \ub514\uc790\uc778\uc5d0 \ub300\ud55c \uac1c\uc778\uc801\uc73c\ub85c \uc2a4\ud130\ub514 \ud55c \ub0b4\uc6a9\uc744 \uc801\uc5b4\ubcf4\ub824\uace0 \ud569\ub2c8\ub2e4.<\/p>\n<p>\uc6a9\uc5b4\uc5d0 \ub300\ud55c \uc815\uc758\ub97c \ub0b4\ub9ac\uace0 \uc218\uc2dd\uc73c\ub85c \uc815\ub9ac\ud558\uae30 \uc704\ud574 \ub17c\uc758\ub97c \ub354 \uc774\uc5b4\uac00\uaca0\uc2b5\ub2c8\ub2e4. \ube44\uc2b7\ud55c \ub0b4\uc6a9\ucc98\ub7fc \ubcf4\uc774\ub294\ub370 \uc774\ubc88\uc5d0\ub294 \uad00\uc810\uc744 \uce74\ub4dc(\ud589)\uac00 \uc544\ub2cc \uc0c9\uae54(\uc5f4)\ub85c \ubd05\uc2dc\ub2e4. \uc11c\ub85c \ub2e4\ub978 \uc784\uc758\uc758 \ub450 \uac1c\uc758 \uc0c9\uae54\uc744 \uace8\ub77c\ubd05\uc2dc\ub2e4. \uc5ec\uae30\uc120 3\ubc88-\ub178\ub780\uc0c9 \uc5f4\uacfc 5\ubc88-\ud30c\ub780\uc0c9 \uc5f4\uc744 \uace8\ub77c\uc11c \ube44\uad50\ud558\uba74 \ud574\ub2f9 \uc0c9\uae54\uc774 \uacf5\ud1b5\uc73c\ub85c \ub098\uc624\ub294 \uce74\ub4dc\ub294 B2; 1\uac1c(\u03bb) \uc785\ub2c8\ub2e4. \uadf8\ub9ac\uace0 3\ubc88-\ub178\ub780\uc0c9\uc774 \ub098\uc624\ub294 \uce74\ub4dc\ub294 B2, B3, B7 \uc774\ub807\uac8c \ucd1d 3\ubc88(r) \ub098\uc635\ub2c8\ub2e4. \ubc18\ubcf5 \ud69f\uc218\ub77c\uace0 \uc801\uc5b4\ubcfc\uac8c\uc694.<\/p>\n<p>\uc870\uae08 \uc5b4\ub824\uc6b4 \uc6a9\uc5b4\ub77c\uc11c \uc815\ud655\ud55c \uc815\uc758\ubcf4\ub2e4\ub294 \uac1c\ub150\uc801\uc73c\ub85c \ub300\uac15 \uc801\uc5b4 \ubcf4\uba74 7\uc885\ub958 \uc0c9\uae54\uc744 \uadf8\ubcf4\ub2e4 \uc801\uc740 3\uac1c\uc529 \uba87 \uac1c\uc758 \ube14\ub85d\uc73c\ub85c \ucabc\uac1c\uc11c (\uc5ec\uae30\uc11c\ub294 \ucd1d 7\uc7a5\uc758 \uce74\ub4dc\ub97c \uc0ac\uc6a9\ud588\uc73c\ub2c8 7\ube14\ub85d\uc73c\ub85c \ub098\ub204\uc5b4\uc11c) \uac01 \uc0c9\uae54\uc774 \ub3d9\uc77c\ud55c \ubc18\ubcf5 \ud69f\uc218\ub9cc\ud07c \ub098\uc624\uba74\uc11c\ub3c4 \uc11c\ub85c \ub2e4\ub978 \ub450 \uac1c\uc758 \uc0c9\uae54\uc744 \uace8\ub790\uc744 \ub54c 1\uac1c\uc758 \ube14\ub85d\uc5d0\uc11c\ub9cc \uace0\ub978 \uc0c9\uae54\uc774 \uacf5\ud1b5\uc73c\ub85c \ub098\uc624\ub294 \uc774\ub7ec\ud55c \ube14\ub85d \ub514\uc790\uc778\uc744 <em>Balanced Incomplete Block Design<\/em> \uc774\ub77c\uace0 \uc815\uc758\ud569\uc2dc\ub2e4. \uc55e\uc73c\ub85c \uc904\uc5ec\uc11c BIBD \ub77c\uace0 \uc801\uaca0\uc2b5\ub2c8\ub2e4. (\uc22b\uc790\ub294 \uc880 \ubcc0\uacbd\ub420 \uc218 \uc788\uace0 \uc815\ud655\ud55c \uc815\uc758\uac00 \uc544\ub2d0 \uc218\ub3c4 \uc788\uc9c0\ub9cc \ub0b4\uc6a9\uc774 \ub108\ubb34 \ub531\ub531\ud574 \uc9c0\ub294 \uac83\uc744 \ubc29\uc9c0\ud558\uace0\uc790 \ud568\uc774\ub2c8 \uc774\ud574\ub97c \ubd80\ud0c1)<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_%EC%B6%94%EA%B0%80%EC%98%88%EC%A0%9C\"><\/span>3. \ucd94\uac00\uc608\uc81c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\uc704\uc5d0\uc11c \uc815\uc758\ud55c (v, k, \u03bb)\uc758 \uc758\ubbf8\ub97c \uc9da\uc5b4\ubcf4\uae30 \uc704\ud574 \uba87 \uac00\uc9c0 \uc608\uc81c\ub97c \ub9cc\ub4e4\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n<p>(v, k, \u03bb)=(6, 3, 2) \uc608\uc81c<\/p>\n<div id=\"attachment_5830\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5830\" loading=\"lazy\" class=\"wp-image-5830\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_0.png\" alt=\"\" width=\"320\" height=\"279\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_0.png 698w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_0-300x262.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_0-624x544.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5830\" class=\"wp-caption-text\">(6, 3, 2) \uc608\uc81c<\/p><\/div>\n<p>6\uc885\ub958(v)\uc758 \uc0c9\uae54\uc774 \uc788\uace0 \uc774 \uc911 3\uac00\uc9c0(k) \uc0c9\uae54\uc744 \uace8\ub77c 10\uc7a5\uc758 \uce74\ub4dc\ub97c \ub9cc\ub4dc\ub294 \ub514\uc790\uc778 \uc911\uc5d0\uc11c \uc11c\ub85c \ub2e4\ub978 \ub450 \uac1c\uc758 \uc0c9\uae54\uc774 2\uac1c(\u03bb)\uc758 \ube14\ub85d\uc5d0\uc11c\ub9cc \uac19\uc774 \ub098\uc624\ub3c4\ub85d \ud558\ub294 \ub514\uc790\uc778\uc785\ub2c8\ub2e4. \uc5ec\uae30\uc11c \u03bb\uc758 \uc758\ubbf8 \ud30c\uc545\uc774 \uc27d\uc9c0 \uc54a\uc744 \uc218\ub3c4 \uc788\uc5b4\uc11c \uadf8\ub9bc\uc744 \ucd94\uac00\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n<div id=\"attachment_5831\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5831\" loading=\"lazy\" class=\"wp-image-5831\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_1.png\" alt=\"\" width=\"320\" height=\"279\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_1.png 698w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_1-300x262.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_1-624x544.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5831\" class=\"wp-caption-text\">(6,3,2) \uc608\uc81c \ubcf4\ucda9\uc124\uba851<\/p><\/div>\n<p>\uc11c\ub85c \ub2e4\ub978 \ub450 \uac1c\uc758 \uc0c9\uae54; \uc608\ub97c \ub4e4\uc5b4 2\ubc88\uacfc 5\ubc88 \uc0c9\uae54\uc744 \uace8\ub77c\ubd05\uc2dc\ub2e4. \uadf8\ub7ec\uba74 \ud574\ub2f9 \uc0c9\uae54\uc774 \uac19\uc774 \ub098\uc624\ub294 \ube14\ub85d\uc740 B7\uacfc B8 \uc774\ub807\uac8c 2\uac1c(\u03bb)\uc785\ub2c8\ub2e4. \uc774\uac83\uc774 \u03bb\uc5d0 \ub300\ud55c \uc815\uc758\uc785\ub2c8\ub2e4. \ubc18\ubcf5\ud69f\uc218\ub97c \ubcf4\uba74 2, 5\ubc88 \uc0c9\uae54\uc740 \ucd1d 5\ubc88\uc529(r) \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ub610 \ub2e4\ub978 \uc608\uc81c\ub97c \ub4e4\uc5b4\ubd05\uc2dc\ub2e4.<\/p>\n<div id=\"attachment_5832\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5832\" loading=\"lazy\" class=\"wp-image-5832\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_2.png\" alt=\"\" width=\"320\" height=\"279\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_2.png 698w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_2-300x262.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/632_2-624x544.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5832\" class=\"wp-caption-text\">(6, 3, 2) \uc608\uc81c \ubcf4\ucda9\uc124\uba852<\/p><\/div>\n<p>\uc774\ubc88\uc5d0\ub294 \uc11c\ub85c \ub2e4\ub978 \ub450 \uac1c\uc758 \uc0c9\uae54; \uc608\ub97c \ub4e4\uc5b4 3\ubc88\uacfc 4\ubc88 \uc0c9\uae54\uc744 \uace8\ub77c\ubd05\uc2dc\ub2e4. \uadf8\ub7ec\uba74 \ud574\ub2f9 \uc0c9\uae54\uc774 \uac19\uc774 \ub098\uc624\ub294 \ube14\ub85d\uc740 B9\uacfc B10 \uc774\ub807\uac8c 2\uac1c(\u03bb)\uc785\ub2c8\ub2e4. \ub9c8\ucc2c\uac00\uc9c0\ub85c \ubc18\ubcf5\ud69f\uc218\ub294 3, 4\ubc88 \uc0c9\uae54\ub3c4 \ucd1d 5\ubc88\uc529(r) \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc774\uac83\ubfd0\ub9cc \uc544\ub2c8\ub77c \uc784\uc758\uc758 \uc11c\ub85c \ub2e4\ub978 \ub450 \uac1c\uc758 \uc0c9\uae54\uc744 \uace0\ub974\ub354\ub77c\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\uc785\ub2c8\ub2e4. \uc774\uc81c \u03bb\uc758 \uc815\uc758\ub294 \uc5b4\ub290 \uc815\ub3c4 \uc774\ud574\ub418\uc5c8\uc744 \uac83\uc774\ub77c \ubd05\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \uc774\uc81c \uc6a9\uc5b4\ub97c \uc815\uc758\ud574\ubd05\uc2dc\ub2e4.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_%EC%9A%A9%EC%96%B4%EC%A0%95%EC%9D%98_%EB%B0%8F_%EC%88%98%EC%8B%9D\"><\/span>4. \uc6a9\uc5b4\uc815\uc758 \ubc0f \uc218\uc2dd<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<span class=\"wp-katex-eq\" data-display=\"false\">b<\/span>: \ube14\ub85d\uc758 \uc218<\/p>\n<span class=\"wp-katex-eq\" data-display=\"false\">v<\/span>: \uc885\ub958\uc758 \uac1c\uc218<\/p>\n<span class=\"wp-katex-eq\" data-display=\"false\">k<\/span>: \uac01\uac01 \ube14\ub85d\uc548\uc758 \uc885\ub958\uc758 \uac1c\uc218<\/p>\n<span class=\"wp-katex-eq\" data-display=\"false\">r<\/span>: \ud55c \uc885\ub958\uac00 \ucd1d \uba87 \ubc88 \ubc18\ubcf5\ub418\ub294\uc9c0 \uc989 \ubc18\ubcf5 \ud69f\uc218\ub97c \ub098\ud0c0\ub0c4.<\/p>\n<span class=\"wp-katex-eq\" data-display=\"false\">\\lambda<\/span>: \uc11c\ub85c \ub2e4\ub978 \ub450 \uc885\ub958\ub97c \uace8\ub790\uc744 \ub54c, \uba87 \uac1c\uc758 \ube14\ub85d\uc5d0\uc11c \uc120\ud0dd\ud55c \ub450 \uc885\ub958\uac00 \uac19\uc774 \ub098\uc624\ub294\uc9c0\ub97c \ub098\ud0c0\ub0c4.<\/p>\n<p style=\"padding-left: 40px;\"><strong>Theorem.<\/strong> BIBD(v, k, \u03bb)\uc5d0\uc11c \ub2e4\uc74c \uc2dd\uc774 \uc131\ub9bd\ud569\ub2c8\ub2e4.<\/p>\n<p style=\"padding-left: 40px;\"><span class=\"wp-katex-eq\" data-display=\"false\">\\lambda(v-1)=(k-1)r<\/span> &#8230; <strong>(4.1)<br \/>\n<\/strong><span class=\"wp-katex-eq\" data-display=\"false\">bk=vr<\/span> &#8230; <strong>(4.2)<\/strong><\/p>\n<p>\uc99d\uba85) \uc544\ub798 \uadf8\ub9bc\uc744 \ubcf4\uba74\uc11c \uc774\ud574\ud574 \ubd05\uc2dc\ub2e4. \uc6a9\uc5b4\ub97c \uadf8\ub9bc\uc73c\ub85c \ub098\ud0c0\ub0b8 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<div id=\"attachment_5859\" style=\"width: 490px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5859\" loading=\"lazy\" class=\"wp-image-5859\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/theorem1.png\" alt=\"\" width=\"480\" height=\"420\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/theorem1.png 895w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/theorem1-300x262.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/theorem1-768x672.png 768w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/theorem1-624x546.png 624w\" sizes=\"(max-width: 480px) 100vw, 480px\" \/><p id=\"caption-attachment-5859\" class=\"wp-caption-text\">(4.1) \uc218\uc2dd \uc99d\uba85<\/p><\/div>\n<p>\uc6b0\ub9ac\uc758 \ubaa9\ud45c\ub294 <span class=\"wp-katex-eq\" data-display=\"false\">x_i<\/span> \ub97c \uc81c\uc678\ud55c \uc5f4(\uc8fc\ud669\uc0c9 \uc74c\uc601\uc744 \uc81c\uc678\ud55c) \ub098\uba38\uc9c0 \uc22b\uc790\uc758 \ud569\uacc4\ub97c \uad6c\ud558\ub294 \uac8c \ubaa9\ud45c\uc785\ub2c8\ub2e4. \ub450 \uc885\ub958\uc758 \uc0c9\uae54 <span class=\"wp-katex-eq\" data-display=\"false\">x_i<\/span> \uc640 y \ub97c \uc120\ud0dd\ud569\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \u03bb\uac1c \ube14\ub85d\uc5d0\uc11c \uc120\ud0dd\ud55c \uc0c9\uae54\uc774 \ub098\uc635\ub2c8\ub2e4. \uc774\ub7ec\ud55c y\ub97c \uba87 \uac1c\ub098 \uace0\ub97c \uc218 \uc788\uc744\uae4c\uc694? <span class=\"wp-katex-eq\" data-display=\"false\">x_i<\/span> \uc790\uc2e0\uc744 \uc81c\uc678\ud558\uace0 \uc120\ud0dd\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \ucd1d (v-1)\uac1c \uc785\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \ucd1d \uac1c\uc218\ub294<\/p>\n<p style=\"padding-left: 40px;\"><span class=\"wp-katex-eq\" data-display=\"false\">\\lambda(v-1)<\/span>.<\/p>\n<p>\uc774 \ub429\ub2c8\ub2e4.<\/p>\n<p>\ud55c\ud3b8, <span class=\"wp-katex-eq\" data-display=\"false\">x_i<\/span> \uc5f4\uc744 \uc81c\uc678\ud558\uba74 \uac01 \ube14\ub85d\ub2f9 \uac00\ub85c \uac1c\uc218\ub294 k-1\uac1c \uc774\uace0 \uac01 \uc0c9\uae54\uc740 \ubc18\ubcf5 \ud69f\uc218\uac00 r\ubc88\uc529 \uc774\ubbc0\ub85c<\/p>\n<p style=\"padding-left: 40px;\"><span class=\"wp-katex-eq\" data-display=\"false\">(k-1)r<\/span>.<\/p>\n<p>\uac00 \ub429\ub2c8\ub2e4. \uc11c\ub85c \ub2e4\ub978\ubc29\ubc95\uc73c\ub85c \uce74\uc6b4\ub4dc \ud55c \uc22b\uc790\uac00 \uc11c\ub85c \uac19\uc73c\ubbc0\ub85c<\/p>\n<p style=\"padding-left: 40px;\"><span class=\"wp-katex-eq\" data-display=\"false\">\\lambda(v-1)=(k-1)r<\/span>.<\/p>\n<p>\uc774 \ub418\uc5b4 (4.1) \uc99d\uba85\uc774 \ub05d\ub0a9\ub2c8\ub2e4. (4.2)\ub294 \uc704\uc640 \ube44\uc2b7\ud558\uac8c \uc804\uccb4 \uc22b\uc790\ub97c \uce74\uc6b4\ud2b8\ud558\ub294 \ubc29\uc2dd\uc73c\ub85c \ub530\uc838\ubcf4\uba74 \uc774\ud574\uac00 \ub420 \uac70\ub77c \uc0dd\uac01\ub418\ub124\uc694. (4.1), (4.2)\ub97c \ud1b5\ud574 \ub2e4\uc74c\uc744 \uc720\ub3c4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p style=\"padding-left: 40px;\"><span class=\"wp-katex-eq\" data-display=\"false\">b=\\dfrac{v(v-1)}{k(k-1)}<\/span>\n<p>v, k, \u03bb\uc758 \uac12\uc774 \uc124\uacc4\ub418\uba74 b\uc640 r \uac12\uc744 \uad6c\ud560 \uc218 \uc788\uace0 \uc5ec\uae30\uc11c \ubaa8\ub4e0 \uac12\uc740 <span style=\"color: #0000ff;\"><strong>\uc815\uc218<\/strong><\/span>\ub77c\ub294 \uac83\uc744 \uae30\uc5b5\ud574 \ub461\uc2dc\ub2e4.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_%EC%98%88%EC%A0%9C_%EB%8D%94_%EC%95%8C%EC%95%84%EB%B3%B4%EA%B8%B0\"><\/span>5. \uc608\uc81c \ub354 \uc54c\uc544\ubcf4\uae30<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>(1) (v, k, \u03bb)=(9, 3, 1) \uc608\uc81c<\/p>\n<span class=\"wp-katex-eq\" data-display=\"false\">b=\\dfrac{9*8}{3*2}=12<\/span> \ube14\ub85d\uc774 \ud544\uc694\ud568\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<div id=\"attachment_5842\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5842\" loading=\"lazy\" class=\"wp-image-5842\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_0.png\" alt=\"\" width=\"320\" height=\"251\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_0.png 910w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_0-300x236.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_0-768x603.png 768w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_0-624x490.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5842\" class=\"wp-caption-text\">(9, 3, 1) \uc608\uc81c<\/p><\/div>\n<p>\uc11c\ub85c \ub2e4\ub978 \ub450 \uac1c\uc758 \uc0c9\uae54; \uc608\ub97c \ub4e4\uc5b4 2\ubc88\uacfc 6\ubc88 \uc0c9\uae54\uc744 \uace8\ub77c\ubd05\uc2dc\ub2e4. \uadf8\ub7ec\uba74 \ud574\ub2f9 \uc0c9\uae54\uc774 \uac19\uc774 \ub098\uc624\ub294 \ube14\ub85d\uc740 B9; 1\uac1c(\u03bb)\ubfd0 \uc785\ub2c8\ub2e4.<\/p>\n<div id=\"attachment_5843\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5843\" loading=\"lazy\" class=\"wp-image-5843\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_1.png\" alt=\"\" width=\"320\" height=\"251\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_1.png 910w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_1-300x236.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_1-768x603.png 768w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/931_1-624x490.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5843\" class=\"wp-caption-text\">(9, 3, 1) \uc608\uc81c \ubcf4\ucda9\uc124\uba85<\/p><\/div>\n<p>\ube44\uad50\uc801 \uc720\uba85\ud55c? \uc608\uc81c \uc704\uc8fc\ub85c \uac00\uc838\uc654\ub294\ub370 \uadf8\ub7ec\uba74 \uc5b4\ub5a4 (v, k, \u03bb)\ub97c \uac00\uc838\uc624\ub354\ub77c\ub3c4 BIBD\ub97c \ub9cc\ub4e4 \uc218 \uc788\ub294\uc9c0 \uad81\uae08\ud574\uc84c\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc544\ub798\ub294 <span style=\"text-decoration: underline;\">\uc548\ub418\ub294 \uc608\uc81c<\/span>\uc778\ub370 \ube44\uc2b7\ud558\uac8c \ub9cc\ub4e4\uc5b4 \ubd24\uc2b5\ub2c8\ub2e4.<\/p>\n<p>(2) (v, k, \u03bb)=(6, 3, 1) \uc608\uc81c<\/p>\n<div id=\"attachment_5847\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5847\" loading=\"lazy\" class=\"wp-image-5847\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_0.png\" alt=\"\" width=\"320\" height=\"157\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_0.png 698w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_0-300x147.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_0-624x307.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5847\" class=\"wp-caption-text\">(6, 3, 1) \uc548\ub418\ub294 \uc608\uc81c<\/p><\/div>\n<p>\uadf8\ub7f4\ub4ef\ud558\uac8c \ube44\uc2b7\ud558\uac8c \ub9cc\ub4e4\uc5c8\uc2b5\ub2c8\ub2e4. 2\ubc88 \uc0c9\uae54\uc744 \uae30\uc900\uc73c\ub85c \ub2e4\ub978 \uc0c9\uae54\uacfc \ube44\uad50\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n<div id=\"attachment_5848\" style=\"width: 330px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5848\" loading=\"lazy\" class=\"wp-image-5848\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_1.png\" alt=\"\" width=\"320\" height=\"181\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_1.png 698w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_1-300x170.png 300w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/631_1-624x353.png 624w\" sizes=\"(max-width: 320px) 100vw, 320px\" \/><p id=\"caption-attachment-5848\" class=\"wp-caption-text\">(6, 3, 1) \uc608\uc81c \ubcf4\ucda9\uc124\uba85<\/p><\/div>\n<p>2-3 \uc0c9\uae54\uc744 \uc120\ud0dd\ud558\uba74 B1\uc5d0\uc11c; 2-4 \uc0c9\uae54\uc744 \uc120\ud0dd\ud558\uba74 B5\uc5d0\uc11c; 2-5 \uc0c9\uae54\uc744 \uc120\ud0dd\ud558\uba74 B5\uc5d0\uc11c; 2-6 \uc0c9\uae54\uc744 \uc120\ud0dd\ud558\uba74 B3\uc5d0\uc11c\ub9cc \uc120\ud0dd\ud55c \uc0c9\uae54\uc774 \ub098\uc624\ubbc0\ub85c \u03bb=1\ub85c \uc798 \ub41c \uac70 \ucc98\ub7fc \ubcf4\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc, 2-1 \uc0c9\uae54\uc744 \ube44\uad50\ud558\uba74 B1, B3 \uc774\ub807\uac8c \ub450 \uad70\ub370\uc5d0\uc11c \uc120\ud0dd\ud55c \uc0c9\uae54\uc774 \ub098\uc624\ubbc0\ub85c \uc774\ucabd\uc740 \u03bb=2\ub85c \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc2e4\uc81c\ub85c \uc704\uc5d0 \uc218\uc2dd (4.1)\uc5d0 (v, k, \u03bb)=(6, 3, 1)\uc744 \ub123\uc5b4\ubcf4\uba74 r=5\/2 \uac00 \ub098\uc640\uc11c \uc815\uc218\uac00 \uc548\ub429\ub2c8\ub2e4. \uadf8\ub7ec\ubbc0\ub85c BIBD \uc124\uacc4\uac00 \uc548 \ub429\ub2c8\ub2e4. \uc0ac\uc2e4 \ubc18\ubcf5 \ud69f\uc218 r\ub3c4 \uc0c9\uae54\ub9c8\ub2e4 \ub2e4\ub985\ub2c8\ub2e4.<\/p>\n<p>\ub2e4\uc74c \ub0b4\uc6a9\uc744 \uac04\ub2e8\ud788 \uccb4\ud06c\ud558\uace0 \ub118\uc5b4\uac11\uc2dc\ub2e4. (\uc99d\uba85\uc740 \uc870\uae08 \ubcf5\uc7a1\ud558\ubbc0\ub85c \uc5ec\uae30\uc120 \uc0dd\ub7b5)<\/p>\n<p style=\"padding-left: 40px;\"><strong>Theorem.<\/strong> BIBD\ub77c\uba74, <span class=\"wp-katex-eq\" data-display=\"false\">b\\ge v.<\/span>\n<p>\uc989, \uc885\ub958\uc758 \uac1c\uc218\ubcf4\ub2e4 \ube14\ub85d \uc218\uac00 \uac19\uac70\ub098 \ub9ce\uc544\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_%EA%B7%B8%EB%9E%98%EC%84%9C_%EB%8F%84%EB%B8%94%EC%9D%B4%EB%9E%91_%EC%96%B4%EB%96%BB%EA%B2%8C_%EC%97%B0%EA%B2%B0%EB%90%98%EB%82%98%EC%9A%94\"><\/span>6. \uadf8\ub798\uc11c \ub3c4\ube14\uc774\ub791 \uc5b4\ub5bb\uac8c \uc5f0\uacb0\ub418\ub098\uc694?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\uc704\uc758 \ubcf5\uc7a1\ud55c \ubcc0\uc218\ub4e4\uc744 \uc870\uc815\ud574\uc11c \ud2b9\ubcc4\ud55c \ucf00\uc774\uc2a4\ub97c \ub9cc\ub4e4\uc5b4 \ubd05\uc2dc\ub2e4. \ud2b9\ubcc4\ud788 \ube14\ub85d\uac1c\uc218=\uc885\ub958\uac1c\uc218 \uc989, b=v\uac00 \ub418\ub294 \uacbd\uc6b0\ub97c \uc0dd\uac01\ud574 \ubd05\uc2dc\ub2e4. \uc9c0\uae08\uae4c\uc9c0 \uc704\uc758 \ud14c\uc774\ube14\uc5d0\uc11c \uac00\ub85c\ub294 v\ub97c \ud45c\ud604\ud588\uace0 \uc138\ub85c\ub294 b\ub97c \ud45c\ud604\ud588\uc73c\ub2c8 \ud589\uacfc\uc5f4\uc758 \uae38\uc774\uac00 \uac19\uc544\uc9c0\uaca0\uc8e0. \uc5ec\uae30\uc5d0 \u03bb=1 \uc778 \uacbd\uc6b0\ub9cc \uc0dd\uac01\ud569\uc2dc\ub2e4. \ud589\uacfc\uc5f4\uc758 \uae38\uc774\uac00 \uac19\uc544\uc84c\uc73c\ubbc0\ub85c \uc774\uc81c \u03bb=1 \uc744 \ube14\ub85d(\uce74\ub4dc)\uac04 \uacb9\uce58\ub294 \uc0c9\uae54\uc774 \ud55c \uac1c\ub77c\ub294 \uce5c\uc219\ud55c(?) \uc758\ubbf8\ub85c \ud574\uc11d\ud560 \uc218 \uc788\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<p>b=v \uc774\ubbc0\ub85c \uc218\uc2dd(4.2)\uc5d0\uc11c \uc790\ub3d9\uc801\uc73c\ub85c k=r \uc774 \ub418\uace0 \uc774\uac78 (4.1)\uc5d0 \ub123\uace0 \uc815\ub9ac\ud574\ubcf4\uba74<\/p>\n<p style=\"padding-left: 40px;\"><span class=\"wp-katex-eq\" data-display=\"false\">v=k(k-1)+1<\/span> &#8230; <strong>(6.1)<\/strong><\/p>\n<p>\uc774 \ub429\ub2c8\ub2e4.<\/p>\n<p>\uc774\uac8c \ubb54 \ub73b\uc774\ub0d0\uba74 \ub9e8 \ucc98\uc74c\uc73c\ub85c \ub3cc\uc544\uac00\uc11c k\uc758 \uc758\ubbf8\ub97c \uc0b4\ud3b4\ubcf4\uba74 \uc804\uccb4 \uc885\ub958\uc5d0\uc11c \uce74\ub4dc\uc5d0 \uadf8\ub824\uc9c0\ub294 \uc885\ub958\uc758 \uc218\ub97c \uc758\ubbf8\ud558\uc8e0. \uccab \ubcf4\ub4dc\uac8c\uc784\uc5d0\uc11c\ub294 \uce74\ub4dc \ud55c \uc7a5\ub2f9 \uc11c\ub85c \ub2e4\ub978 3\uac1c\uc758 \uc0c9\uae54 \uce90\ub9ad\ud130\uac00 \uadf8\ub824\uc838 \uc788\uc5c8\uc8e0. k=3 \uc785\ub2c8\ub2e4. \uc774\uac83\uc744 (6.1)\uc5d0 \ub300\uc785\ud558\uba74 v=7 \uc774 \ub098\uc635\ub2c8\ub2e4. \uc989, 7\uc885\ub958\uc758 \uc0c9\uae54\uc774 \uc788\uc73c\uba74 7\uc7a5\uc758 \uce74\ub4dc\ub97c \uc900\ube44\ud574\uc11c \uc11c\ub85c \ub2e4\ub978 3\uac00\uc9c0 \uc0c9\uae54 \uce90\ub9ad\ud130\ub97c \uc798 \uadf8\ub824\ub193\uc73c\uba74 \u03bb=1 \uce74\ub4dc\uac04 \uacb9\uce58\ub294 \uc0c9\uae54\uc774 \ud55c \uac1c\ub9cc \ub098\uc624\ub3c4\ub85d \uc124\uacc4\uac00 \uac00\ub2a5\ud558\uac8c \ub429\ub2c8\ub2e4.<\/p>\n<p>\ub3c4\ube14\uc740 \uce74\ub4dc \ud55c \uc7a5\ub2f9 \uc11c\ub85c \ub2e4\ub978 8\uac1c\uc758 \uce90\ub9ad\ud130\uac00 \uadf8\ub824\uc838 \uc788\uc5c8\uc8e0. k=8 \uc785\ub2c8\ub2e4. \uc774\uac83\uc744 (6.1)\uc5d0 \ub300\uc785\ud558\uba74 v=57 \uc774 \ub098\uc635\ub2c8\ub2e4. \uc989, 57\uc885\ub958\uac00 \uc788\uace0 57\uc7a5\uc758 \uce74\ub4dc\ub97c \uc900\ube44\ud574\uc11c \uc11c\ub85c \ub2e4\ub978 8\uac00\uc9c0 \uce90\ub9ad\ud130\ub97c \uc798 \uadf8\ub824\ub193\uc73c\uba74 \u03bb=1 \uce74\ub4dc\uac04 \uacb9\uce58\ub294 \uce90\ub9ad\ud130\uac00 \ud55c \uac1c\ub9cc \ub098\uc624\ub3c4\ub85d \uc124\uacc4\uac00 \uac00\ub2a5\ud558\uac8c \ub429\ub2c8\ub2e4.<\/p>\n<p>\uadf8\ub7f0\ub370 \ub3c4\ube14\uce74\ub4dc\ub294 2\uc7a5\uc744 \ube7c\ub193\uc740 55\uc7a5\ub9cc \uc788\ub2e4\uace0 \ud569\ub2c8\ub2e4. 2\uc7a5\uc744 \ube7c\ub193\uc740 \uc774\uc720\ub97c \ucc3e\uc544\ubcf4\ub2c8 \uba87 \uac00\uc9c0 \uc788\ub358\ub370 \uc800\uc758 \ub1cc\ud53c\uc15c\uc740 \ud070 \uc885\uc774 \uc6d0\ub2e8 \ud55c \uc7a5\uc5d0 11\uc7a5\uc529 \ub098\uc640\uc11c \ubb54\uac00 \ube44\uc6a9\uc801\uc778 \ubb38\uc81c\uac00 \uc788\uc9c0 \uc54a\uc558\uaca0\ub290\ub0d0\ub294 \uc0c1\uc0c1\uc744 \ud574\ubd05\ub2c8\ub2e4. \ucd18\ucd18\ud788 \ubc30\uce58\ud558\ub824\uba74 4\/3\/4\ub85c \uc81c\uc791\ud558\uc9c0 \uc54a\uc558\uc744\uae4c&#8230;?<\/p>\n<div id=\"attachment_5870\" style=\"width: 210px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-5870\" loading=\"lazy\" class=\"wp-image-5870\" src=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/11ea.png\" alt=\"\" width=\"200\" height=\"126\" srcset=\"https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/11ea.png 567w, https:\/\/mightyfriend.net\/wp-content\/uploads\/2024\/09\/11ea-300x188.png 300w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><p id=\"caption-attachment-5870\" class=\"wp-caption-text\">\uadf8\ub0e5 \ucd94\uce21\uc785\ub2c8\ub2e4;<\/p><\/div>\n<h3><span class=\"ez-toc-section\" id=\"7_%EC%A2%80_%EB%8D%94_%EC%83%9D%EA%B0%81%ED%95%B4_%EB%B3%BC%EA%B1%B0%EB%A6%AC\"><\/span>7. \uc880 \ub354 \uc0dd\uac01\ud574 \ubcfc\uac70\ub9ac<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>(1) \uc704\uc5d0 \uc608\uc81c\uc5d0\uc11c k=3, 8\uc778 \uacbd\uc6b0\ub97c \ub2e4\ub918\ub294\ub370 \uadf8\ub7ec\uba74 k=4, 5, 6, 7\uc778 \uacbd\uc6b0\ub294 \uc5b4\ub5a8\uae4c\uc694? \uadf8\ub7ec\uba74 \uac01\uac01 v=13, 21, 31, 43 \uac12\uc774 \ub098\uc624\ub2c8\uae50 BIBD \ub97c \ub9cc\ub4e4 \uc218 \uc788\uaca0\uc8e0. \ud2b9\ubcc4\ud788 (v, k, \u03bb)=(43, 7, 1)\uc744 \uc0dd\uac01\ud574 \ubd05\uc2dc\ub2e4. 43\uc885\ub958\uc758 \uce90\ub9ad\ud130\ub97c \uc900\ube44\ud558\uace0 43\uc7a5\uc758 \uce74\ub4dc\ub97c \uc900\ube44\ud574\uc11c \uc11c\ub85c \ub2e4\ub978 7\uac00\uc9c0 \uce90\ub9ad\ud130\ub97c \uadf8\ub9ac\ub294 \uacbd\uc6b0\uaca0\uc8e0.<\/p>\n<p><strong>\uadf8\ub7f0\ub370 \uc774 \uacbd\uc6b0\ub294 BIBD\ub97c \ub9cc\ub4e4 \uc218 \uc5c6\ub2e4\uace0 \ud569\ub2c8\ub2e4.<\/strong> \uc218\uc2dd\uc744 \uacc4\uc0b0\ud574\ub3c4 \ubaa8\ub4e0 \uac12\ub4e4\uc774 \uc815\uc218\uac12\uc73c\ub85c \ub098\uc640\ub3c4 \ub9d0\uc774\uc8e0. \uc989, \ubaa8\ub4e0 \uac12\ub4e4\uc774 \uc815\uc218\uc778 \uac83\uc740 BIBD\uc758 \ud544\uc694\uc870\uac74\uc774\uc9c0 \ucda9\ubd84\uc870\uac74\uc774 \ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774\uac8c \ub610 \uc720\uba85\ud55c 36\uba85\uc758 \uc7a5\uad50 \ubc30\uce58 \ubb38\uc81c &#8211; \uc9c1\uad50 Latin Square \ubb38\uc81c\uc640 \uc5f0\uad00\uc774 \uc788\ub294 \uac70 \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<p>(2) (v, k, \u03bb)=(13, 4, 1)\uc740 BIBD\ub97c \ub9cc\ub4e4 \uc218 \uc788\uc744\uae4c\uc694?<\/p>\n<p>\uac00\ub2a5\ud569\ub2c8\ub2e4. ChatGPT\uc5d0 \ubb3c\uc5b4\ubcf4\ub2c8 \uae08\ubc29 \ub9cc\ub4e4\uc5b4 \uc8fc\ub124\uc694. \ud589\ub82c \ud615\ud0dc\ub85c \ud45c\ud604\ud558\uba74 \ubcf4\uae30 \uc26c\uc6b0\ub098 \uc591\uc774 \ub108\ubb34 \ub9ce\uc740 \uac70 \uac19\uc544\uc11c \ubc11\uc5d0 \uc9d1\ud569\uc73c\ub85c \ud45c\ud604\ud588\uc2b5\ub2c8\ub2e4. \uadf8\uac83\ubcf4\ub2e4 \uc758\ubb38\uc810\uc740 \uc544\ub798 \ubc29\ubc95\uc774 \uc720\uc77c\ud55c \uac83\uc778\uac00? \uba87 \uac1c\ub098 \ub9cc\ub4e4 \uc218 \uc788\uc744\uae4c? \uc5b4\ub5bb\uac8c \ub9cc\ub4dc\ub294 \ubc29\ubc95\uc774 \uc788\uc744\uae4c? \uc600\ub294\ub370 \uc544\uc9c1 \uac70\uae30\uae4c\uc9c4 \uacf5\ubd80\ud558\uc9c4 \ubabb\ud588\ub124\uc694. \ub2e4\uc74c\uc5d0 \ub354 \uacf5\ubd80\ud558\uac8c \ub418\uba74 \ub530\ub85c \uc801\uc5b4\ubcf4\ub835\ub2c8\ub2e4.<\/p>\n<p>\ub2f5: {1 2 3 4}, {1 5 6 7}, {1 8 9 10}, {1 11 12 13},<br \/>\n{2 5 8 11}, {2 6 9 12}, {2 7 10 13},<br \/>\n{3 5 9 13}, {3 6 10 11}, {3 7 8 12},<br \/>\n{4 5 10 12}, {4 6 8 13}, {4 7 9 11}<\/p>\n<p>\uc774\uac78\ub85c 13\uc7a5 \uc9dc\ub9ac \ubbf8\ub2c8\ub3c4\ube14\uc774 \uac00\ub2a5\ud558\uaca0\ub124\uc694.<\/p>\n<p>(3) Projective planes \uc911\uc5d0 \ud2b9\ubcc4\ud55c Case\ub85c Fano plane\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc0ac\uc2e4 \ub9e8 \ucc98\uc74c\uc5d0 \ub098\uc628 (v, k, \u03bb)=(7, 3, 1)\uacfc \ub3d9\uc77c\ud55c \uac83\uc778\ub370 \uc778\ud130\ub137 \uac80\uc0c9\uc73c\ub85c \ub9ce\uc774 \ub098\uc624\ub294 \uac70 \uac19\uc73c\ub2c8 \ud55c\ubc88 \ucc3e\uc544\ubcf4\uc154\uc694.<\/p>\n<p>\u2751 References<\/p>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Block_design\" target=\"_blank\" rel=\"noopener\">https:\/\/en.wikipedia.org\/wiki\/Block_design<\/a>: Block design<\/li>\n<li>Richard A. Brualdi. (1999). <em>Introductory combinatorics<\/em> (3rd ed.), Prentice-Hall, ISBN 0-13-181488-5<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ub3c4\ube14\uc5d0 \uc228\uaca8\uc9c4 \uc218\ud559 \uc6d0\ub9ac\ub97c \ucc3e\ub2e4\uac00 \uacf5\ubd80\ud55c \ub0b4\uc6a9\uc744 \uc815\ub9ac\ud574 \ubd05\ub2c8\ub2e4. \uc0dd\uac01 \uc678\ub85c \uc2ec\uc624\ud558\uba74\uc11c \uc7ac\ubbf8\uc788\ub294 \ub0b4\uc6a9\uc774 \ub9ce\uc774 \uc788\ub124\uc694.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":""},"categories":[349],"tags":[342,343,341,67,54,344],"_links":{"self":[{"href":"https:\/\/mightyfriend.net\/index.php?rest_route=\/wp\/v2\/posts\/5822"}],"collection":[{"href":"https:\/\/mightyfriend.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mightyfriend.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mightyfriend.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mightyfriend.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5822"}],"version-history":[{"count":51,"href":"https:\/\/mightyfriend.net\/index.php?rest_route=\/wp\/v2\/posts\/5822\/revisions"}],"predecessor-version":[{"id":5892,"href":"https:\/\/mightyfriend.net\/index.php?rest_route=\/wp\/v2\/posts\/5822\/revisions\/5892"}],"wp:attachment":[{"href":"https:\/\/mightyfriend.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mightyfriend.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mightyfriend.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}