{"id":3530,"date":"2006-01-10T03:57:00","date_gmt":"2006-01-09T18:57:00","guid":{"rendered":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/?p=3530"},"modified":"2021-08-12T11:56:18","modified_gmt":"2021-08-12T02:56:18","slug":"la2k4guidetwo","status":"publish","type":"post","link":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/2006\/01\/10\/la2k4guidetwo\/","title":{"rendered":"LA2K4GuideTwo"},"content":{"rendered":"

= \uc120\ud615\ub300\uc218\uacf5\ubd80\uc2dc\uc791 =<\/code> <\/p>\n

\ub2e4\uc74c\uc740 \ubca1\ud130, \ud589\ub82c\uacfc \ud589\ub82c\uc2dd\uc758 \ub0b4\uc6a9\uc744 \uacf5\ubd80\ud55c \uc0ac\ub78c\uc774 \uc120\ud615\ub300\uc218\ub97c \uc2dc\uc791\ud560 \ub54c \ud544\uc694\ud55c \uc0dd\uac01\uc744 \uc801\uc740 \uac83\uc785\ub2c8\ub2e4. <\/p>\n

\n

2004\ub144\ub3c4 2\ud559\uae30 \uc120\ud615\ub300\uc218 \uac15\uc758\uc758 \uac1c\uc694<\/h2>\n
\n

1\ud559\uae30\uc5d0 \uacf5\ubd80\ud55c \ud589\ub82c\uacfc \ubca1\ud130\uc5d0 \ub300\ud55c \uc120\ud615\ub300\uc218\ud559\uc740 \uc5b4\ub5a4 \uc758\ubbf8\uc5d0\uc11c \uad6c\uccb4\uc801\uc778 \ub300\uc0c1(\uc88c\ud45c\ub97c \uac00\uc9c0\uace0 \uc2e4\uc218\ub85c \ud45c\ud604\ub41c)\uc744 \ub2e4\ub8e8\ub294 \ubc29\ubc95\uc744 \uc775\ud78c \uac83\uc774\ub77c\uace0 \ud560 \uc218 \uc788\ub2e4. \uc774 \ub54c \uc775\ud78c \ub0b4\uc6a9\uc744 \uac04\ub2e8\ud788 \uc694\uc57d\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4. <\/p>\n

    \n
  1. 1\ucc28\uc5f0\ub9bd\ubc29\uc815\uc2dd\uc758 \uc774\ub860<\/li>\n
  2. 1\ucc28\ud568\uc218(linear transformation)\uc758 \uc774\ub860<\/li>\n
  3. \ub0b4\uc801\uc758 \uc774\ub860<\/li>\n
  4. \uace0\uc720\uac12, \uace0\uc720\ubca1\ud130\uc758 \uc774\ub860<\/li>\n
  5. 2\ucc28\ud568\uc218(quadratic form)\uc758 \uc774\ub860<\/li>\n<\/ol>\n

    \ub4f1\uc774\ub2e4. \uc774\ub7ec\ud55c \ub0b4\uc6a9\uc740 \uc120\ud615\ub300\uc218\ud559\uc5d0\uc11c typical\ud55c \ub0b4\uc6a9\uc774\ub2e4. \uc120\ud615\ub300\uc218\ud559\uc758 \ub0b4\uc6a9\uc740 \uc6b0\ub9ac\uac00 \uc911,\uace0\ub4f1\ud559\uad50\uc5d0\uc11c \uacf5\ubd80\ud55c 1\ubcc0\uc218\ud568\uc218\uc758 \uc5ec\ub7ec \uc774\ub860(\ubc29\uc815\uc2dd, \ubd80\ub4f1\uc2dd, \ubbf8\ubd84, \uc801\ubd84 \ub4f1\ub4f1)\uc744 \ub2e4\ubcc0\uc218\ud568\uc218\uc758 \uc774\ub860\uc744\ub85c \ud655\uc7a5\ud558\uc5ec \ub2e4\ub8e8\ub824\uace0 \ud560 \ub54c \uac00\uc7a5 \uba3c\uc800 \ub9cc\ub098\ub294 \uac83\ub4e4\uc5d0 \ub300\ud55c \uc774\ub860\uc774\ub2e4. \uc989 1\ucc28\ubc29\uc815\uc2dd \\[ ax=b \\] \ub97c \ud480\uace0 1,2\ucc28\ud568\uc218 \\[ y=ax+b,\\quad y=ax^2+bx+c \\] \uc5d0 \ub300\ud558\uc5ec \uacf5\ubd80\ud588\ub358 \uac83\uc744 \ubcc0\uc218(\ub3c5\ub9bd\ubcc0\uc218, \uc885\uc18d\ubcc0\uc218)\uc758 \uac1c\uc218\ub97c \uc5ec\ub7ec\uac1c\ub85c \ub298\ub838\uc744 \ub54c\ub294 \uc5b4\ub5bb\uac8c \ud574\uc57c \ud558\ub294\uac00\ub97c \uacf5\ubd80\ud558\ub294 \uac83\uc774\ub2e4. \uadf8\ub798\uc11c \uc704\uc5d0\uc11c \uacf5\ubd80\ud55c \ub0b4\uc6a9\uc744 \ubcf4\uba74 \uac04\ub2e8\ud788 1\ucc28\ud568\uc218\uc640 2\ucc28\ud568\uc218\uc758 \uc774\ub860\uc774\ub77c\uace0 \ud560 \uc218 \uc788\ub2e4. \uadf8 \ubc16\uc758 \uac83\uc740 \uc774\ub97c \uc774\ud574\ud558\uae30 \uc704\ud55c \ub3c4\uad6c\ub77c\uace0 \ubcf4\uba74 \ub41c\ub2e4. <\/p>\n

    \uc774\uc81c 2\ud559\uae30\uc5d0\ub294 \ubb34\uc2a8 \uacf5\ubd80\ub97c \ud558\ub294\uac00? \ub9c8\ucc2c\uac00\uc9c0\uc774\ub2e4. 1\ud559\uae30\uc5d0 \uacf5\ubd80\ud588\ub358 \uac83\uacfc \ub611\uac19\uc774 1\ucc28\ud568\uc218\uc640 2\ucc28\ud568\uc218\uc758 \uc774\ub860\uc744 \uacf5\ubd80\ud55c\ub2e4. \ub2e8\uc9c0 \ub2ec\ub77c\uc9c4 \uac83\uc740 \uc5b4\ub514\uc5d0 \uc815\uc758\ub41c \ud568\uc218\ub4e4\uc778\uac00\uac00 \ub2e4\ub974\ub2e4. \uc55e\uc5d0\uc11c\ub294 $ \\mathbb{R}^n$ \uc5d0\uc11c \uc815\uc758\ub41c \ud568\uc218\ub4e4\uc744 \uacf5\ubd80\ud588\ub2e4\uba74 \uc774\uc81c\ubd80\ud130\ub294 \uc77c\ubc18\uc801\uc778 \ubca1\ud130\uacf5\uac04(linear space) $ X $ \uc5d0\uc11c \uc815\uc758\ub41c \ud568\uc218\ub97c \uacf5\ubd80\ud55c\ub2e4\ub294 \ub9cc\ud07c \ub2e4\ub974\ub2e4. <\/p>\n

    \uadf8\ub7fc \uc2e4\uc81c\ub85c\ub294 \uc5bc\ub9c8\ub098 \ub2ec\ub77c\uc84c\ub294\uac00? \uc774\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ub450 \uac00\uc9c0 \uad00\uc810\uc5d0\uc11c \uc804\ud600 \ub2e4\ub978 \ub300\ub2f5\uc744 \ud560 \uc218 \uc788\ub2e4. <\/p>\n

      \n
    1. \uc6b0\uc120 \ud568\uc218\uc758 \uc815\uc758\uc5ed\uc774 \uad6c\uccb4\uc801\uc778 $ \\mathbb{R}^n$ \uc5d0\uc11c \uc77c\ubc18\uc801\uc778 \uacf5\uac04\uc73c\ub85c \ubc14\ub010 \uac83 \ubfd0\uc774\uba70 \uc2e4\uc81c\ub85c \uc6b0\ub9ac\uac00 \uacf5\ubd80\ud558\ub294 \ub0b4\uc6a9\uc5d0\uc11c \uadfc\ubcf8\uc801\uc73c\ub85c \ub2ec\ub77c\uc9c0\ub294 \uacb0\uacfc\ub294 \ud558\ub098\ub3c4 \uc5c6\ub2e4.<\/li>\n
    2. \uadf8\ub7ec\ub098 \uc88c\ud45c\ud568\uc218\ub97c \uad6c\uccb4\uc801\uc73c\ub85c \uc7a1\uc9c0 \uc54a\uace0 1\ud559\uae30\ub54c \uacf5\ubd80\ud55c \ub0b4\uc6a9\uc744 \ub2e4\uc2dc \uc774\uc57c\uae30\ud558\ub294 \uac83\uc740 \uc27d\ub2e4\uace0\ub9cc \ud560 \uc218\ub294 \uc5c6\ub2e4. \uc2e4\uc81c\ub85c \uc0c1\ub2f9\ud788 \uace4\ub780\uc744 \uacaa\ub294 \ud559\uc0dd\ub4e4\uc774 \uc788\ub2e4.<\/li>\n<\/ol>\n

      \uc774\ub7ec\ud55c \uc0c1\ud669\uc740 1\ud559\ub144\uae4c\uc9c0 \uacf5\ubd80\ud558\ub358 \uad6c\uccb4\uc801\uc778 \uacc4\uc0b0\ubc95\uc5d0\uc11c \ucd94\uc0c1\uc801\uc778 \uc0ac\uace0\ubc95\uc73c\ub85c \uc804\ud658\ud558\ub294 \uacfc\uc815\uc5d0\uc11c \ub204\uad6c\ub098 \uacaa\ub294 \uc5b4\ub824\uc6b4 \uc810\uc774\ub2e4. \uc120\ud615\ub300\uc218 \uc678\uc5d0\ub3c4 \uad6c\uccb4\uc801\uc778 \ubbf8\uc801\ubd84\ud559\uc5d0\uc11c \ucd94\uc0c1\uc801\uc778 \uc218\ub834\uc758 \uc774\ub860\uc73c\ub85c upgrade\ub41c \ud574\uc11d\ud559, \uc774\ub97c \ub354 upgrade\ud558\uc5ec epsilon-delta \uc5c6\uc774\ub3c4 \uc218\ub834\uc744 \ub2e4\ub8f0 \uc218 \uc788\uac8c \ud574\uc8fc\ub294 \uc704\uc0c1\uc218\ud559, \uad6c\uccb4\uc801\uc778 \ubc29\uc815\uc2dd\uc744 \ud480\ub358 \uc774\uc804\uc758 \uc218\ud559\uc5d0\uc11c \ubc29\uc815\uc2dd \uc804\uccb4\uc758 \ud574\ub97c \ud55c\uaebc\ubc88\uc5d0 \uc774\uc57c\uae30\ud558\ub294 \ub300\uc218\ud559 \ub4f1 \ub300\ud559\uad50\uc758 \uc804\uacf5\uc218\ud559\uc740 \uc774 \ud55c \ub2e8\uacc4\uc758 upgrade\uac00 \ud544\uc694\ud55c \uacf5\ubd80\uc774\ub2e4. <\/p>\n

      \uc774\uc81c \uc774\ub97c \uc798 \ud574\ub098\uac00\uae30 \uc704\ud558\uc5ec \uba87 \uac00\uc9c0 \uc870\uc5b8\uc744 \uc801\uc5b4\ub450\uc790. <\/p>\n

        \n
      1. \uc608\uc2b5\uc744 \ud558\uace0\uc11c \uc218\uc5c5\uc5d0 \ub4e4\uc5b4\uc628\ub2e4.<\/li>\n
      2. \ub9e4 \uc2dc\uac04 \ubcf5\uc2b5\uc744 \ud55c\ub2e4.<\/li>\n
      3. \ub420\uc218 \uc788\uc73c\uba74 \ub9ce\uc774 \ubb3c\uc5b4\ubcf8\ub2e4.<\/li>\n
      4. \uae30\ud68c\ub9cc \ub418\uba74 \ub9ce\uc774 \uac00\ub974\uccd0\uc900\ub2e4.<\/li>\n
      5. \ud63c\uc790 \ub059\ub059\ub300\uc9c0\ub9cc \ub9d0\uace0 \ub450\uba85 \uc774\uc0c1\uc774 \uc11c\ub85c \uc774\uc57c\uae30\ud55c\ub2e4.<\/li>\n
      6. \ub2e4\ub978 \uc0ac\ub78c\uc774 \uc54c\uace0 \uc788\ub294 \uac83\uc740 \ub098\ub3c4 \ud56d\uc0c1 \uc54c\uc544\ub0bc \uc218 \uc788\ub2e4\ub294 \ubbff\uc74c\uc744 \uac16\ub294\ub2e4.<\/li>\n<\/ol>\n

        \uc608\uc2b5\uc740 \uaf2d \uad50\uacfc\uc11c\ub97c \uc77d\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4. \uc6b0\ub9ac\uac00 \ub2e4\ub8e8\ub294 \ub300\uc0c1\uacfc \uad00\ub828\ud558\uc5ec \ubbf8\ub9ac \uc0dd\uac01\ud574 \ubcf8 \uacbd\ud5d8\uc774 \uc788\uc73c\uba74 \ub3c4\uc6c0\uc774 \ub41c\ub2e4. \uadf8\ub9ac\uace0 \ub9ce\uc774 \uc0dd\uac01\ud588\uc73c\uba74 \ub354\uc6b1 \ub3c4\uc6c0\uc774 \ub41c\ub2e4. (\uadf8\ub798\uc11c \uad50\uacfc\uc11c\ub97c \ud55c\ubc88\ub3c4 \uc548 \ubcf8 \uc0ac\ub78c\ub3c4 \ub9ce\uc774 \uc0dd\uac01\ud574 \ubcf8 \ubb38\uc81c\uc5d0 \ub300\ud558\uc5ec \uacf5\ubd80\ud558\uba74 \ube68\ub9ac \uc54c\uc544\ub4e3\ub294\ub2e4.) <\/p>\n

        \ubcf5\uc2b5\uc740 \uc911\uc694\ud558\ub2e4. \ubbf8\ucc98 \uc774\ud574\ud558\uc9c0 \ubabb\ud558\uc600\uc5b4\ub3c4 \uc2dc\uac04\uc911\uc5d0 \uacf5\ubd80\ud55c \uac83\uc740 \uacf0\uacf0\ud788 \uc0dd\uac01\ud574 \ub450\uc5c8\ub2e4\uba74, \uadf8 \ub2e4\uc74c\uc5d0 \ub2e4\uc2dc \uc0dd\uac01\ud558\uc9c0 \uc54a\ub294 \ub3d9\uc548\uc5d0\ub3c4 \uba38\ub9ac\ub294 \uc18d\uc73c\ub85c \uc774\uac83\ub4e4\uc744 \uc815\ub9ac\ud558\uac8c \ub418\uc5b4 \uc5b8\uc820\uac00\ub294 \uac11\uc790\uae30 \uc27d\uac8c \uc774\ud574\uac00 \ub418\ub294 \uc21c\uac04\uc774 \uc0dd\uae30\ub294 \uac83\uc744 \uacbd\ud5d8\ud558\uc600\uc744 \uac83\uc774\ub2e4. \uc801\uc5b4\ub3c4 \uadf8 \uc2dc\uac04\uc5d0 \ubb34\uc5c7\uc744 \ud558\uc600\ub294\uc9c0 \uac04\ub2e8\ud788\ub77c\ub3c4 \uba38\ub9ac\uc18d\uc5d0 \uc815\ub9ac\ud558\uc5ec \ub454\ub2e4. <\/p>\n

        \ubb3c\uc5b4\ubcf4\uace0 \uac00\ub974\uccd0\uc918 \ubcf8 \uacbd\ud5d8\uc774 \uc788\ub294 \uc0ac\ub78c\uc740 \uc5bc\ub9c8\ub098 \uacf5\ubd80\ud558\ub294\ub370 \ub3c4\uc6c0\uc774 \ub418\ub294\uc9c0 \uc54c \uac83\uc774\ub2e4. (\ubc31\u898b\uc774 \ubd88\uc5ec\uc77c\u884c\uc774\ub2e4.) <\/p>\n

        \ubb38\uc81c\uc5d0 \ub2f5\uc774 \uc788\ub2e4\ub294 \uac83\uc744 \uc54c\uae30\ub9cc \ud574\ub3c4 \ubb38\uc81c\ub97c \ud478\ub294\ub370 \ucc28\uc774\uac00 \ub9ce\uc774 \ub09c\ub2e4. ”\ub2e4\ub978 \uc0ac\ub78c\uc774 \uc54c\uace0 \uc788\ub294 \uac83\uc740 \uc54c\uc544\ub0bc \ubc29\ubc95\uc774 \uc788\ub294 \uac83\uc774\uace0 \ub204\uad6c\ub098 \uc54c \uc218 \uc788\ub294 \uac83\uc774\ub2e4.” ”’\uc790\uc2e0\uac10\uc744 \uac00\uc9c0\uace0 \uc2dc\uc791\ud558\uba74 \ubabb\ud560 \uac83\uc774 \uc5c6\ub2e4.”’ <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

        = \uc120\ud615\ub300\uc218\uacf5\ubd80\uc2dc\uc791 = \ub2e4\uc74c\uc740 \ubca1\ud130, \ud589\ub82c\uacfc \ud589\ub82c\uc2dd\uc758 \ub0b4\uc6a9\uc744 \uacf5\ubd80\ud55c \uc0ac\ub78c\uc774 \uc120\ud615\ub300\uc218\ub97c \uc2dc\uc791\ud560 \ub54c \ud544\uc694\ud55c \uc0dd\uac01\uc744 \uc801\uc740 \uac83\uc785\ub2c8\ub2e4. 2004\ub144\ub3c4 2\ud559\uae30 \uc120\ud615\ub300\uc218 \uac15\uc758\uc758 \uac1c\uc694 1\ud559\uae30\uc5d0 \uacf5\ubd80\ud55c \ud589\ub82c\uacfc \ubca1\ud130\uc5d0 \ub300\ud55c \uc120\ud615\ub300\uc218\ud559\uc740 \uc5b4\ub5a4 \uc758\ubbf8\uc5d0\uc11c \uad6c\uccb4\uc801\uc778 \ub300\uc0c1(\uc88c\ud45c\ub97c \uac00\uc9c0\uace0 \uc2e4\uc218\ub85c \ud45c\ud604\ub41c)\uc744 \ub2e4\ub8e8\ub294 \ubc29\ubc95\uc744 \uc775\ud78c \uac83\uc774\ub77c\uace0 \ud560 \uc218 \uc788\ub2e4. \uc774 \ub54c \uc775\ud78c \ub0b4\uc6a9\uc744 \uac04\ub2e8\ud788 \uc694\uc57d\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\ub2e4. 1\ucc28\uc5f0\ub9bd\ubc29\uc815\uc2dd\uc758 \uc774\ub860 1\ucc28\ud568\uc218(linear transformation)\uc758 \uc774\ub860 … \ub354 \uc77d\uae30<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3530","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"distributor_meta":false,"distributor_terms":false,"distributor_media":false,"distributor_original_site_name":"\uae40\uc601\uc6b1","distributor_original_site_url":"https:\/\/mathematicians.korea.ac.kr\/ywkim","push-errors":false,"_links":{"self":[{"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/posts\/3530","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/comments?post=3530"}],"version-history":[{"count":1,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/posts\/3530\/revisions"}],"predecessor-version":[{"id":3531,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/posts\/3530\/revisions\/3531"}],"wp:attachment":[{"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/media?parent=3530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/categories?post=3530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/tags?post=3530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}