{"id":3376,"date":"2006-12-13T08:36:00","date_gmt":"2006-12-12T23:36:00","guid":{"rendered":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/?p=3376"},"modified":"2021-08-12T11:53:39","modified_gmt":"2021-08-12T02:53:39","slug":"%ea%b8%b0%ed%95%98%ed%95%99%ea%b0%9c%eb%a1%a0-2006-q-a","status":"publish","type":"post","link":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/2006\/12\/13\/%ea%b8%b0%ed%95%98%ed%95%99%ea%b0%9c%eb%a1%a0-2006-q-a\/","title":{"rendered":"\uae30\ud558\ud559\uac1c\ub860 2006 Q & A"},"content":{"rendered":"

Q: ruri\uc758 \uc9c8\ubb38: \"geom2k6falqnascan01.jpg\", \"geom2k6falqnascan02.jpg\" <\/p>\n

A: Q1: \ubb3c\ub860 \ub3fc\uc694. \uadf8\uac83\uc740 V’\uc744 \uc18c\uc2e4\uc810 \uc57d\uac04 \uc55e\uc5d0\uc11c \uc18c\uc2e4\uc810\uc73c\ub85c \uc6c0\uc9c1\uc774\uba74\uc11c \uadf9\ud55c\uc744 \uc0dd\uac01\ud574 \ubcf4\uba74 \uc88c\ubcc0, \uc6b0\ubcc0\uc774 \uac01\uac01 \uc55e\uc758 \uc2dd\uc73c\ub85c \uc218\ub834\ud558\ub2c8\uae4c\uc694. \ub4a4\uc2dd\uc740 \uc815\uc758\ub2c8\uae4c \ubb3c\uc5b4\ubcfc \uac83\ub3c4 \uc5c6\uace0\uc694. <\/p>\n

Q2: \uce94\ubc84\uc2a4 \ub9d0\uace0 \ub545\uc5d0\uc11c \ub450 \uc9c1\uc120\uc774 \ud3c9\ud589\uc774\ub77c\ub294 \uac83\uc740 \uc11c\ub85c \ub9cc\ub098\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83\uc774\uace0\uc694. \uc0ac\uc601\ud3c9\uba74\uc5d0\uc11c\ub294 \ubaa8\ub4e0 \uc9c1\uc120\uc774 \uc11c\ub85c \ub9cc\ub098\ub2c8\uae50, \ub545\uc5d0\uc11c \uc548\ub9cc\ub098\ub294 \uac83\uc740 \ub2f9\uc5f0\ud788 \ub545\uc5d0 \uc5c6\ub294 \uc810\uc5d0\uc11c \ub9cc\ub09c\ub2e4\ub294 \ub9d0\uc774\uc9c0\uc694. \uc774\uacf3\uc774 \ubb34\ud55c\uc6d0\uc810\ub4e4\uc774\ub2c8\uae4c… \uc989 \ub545\uc5d0\uc11c \ud3c9\ud589\ud558\ub2e4\ub294 \ub9d0\uc740 \ubb34\ud55c\uc6d0\uc810\uc5d0\uc11c \ub9cc\ub09c\ub2e4\ub294 \ub9d0\uacfc \uac19\uc544\uc694. <\/p>\n

Q3: \ub9de\uc544\uc694. \uadf8\ub807\uac8c\ud558\uba74 \ubd80\ud638\uac00 \uae68\ub057\ud574\uc9c0\ub294\ub370 \ucc45\uc5d0\uc11c\ub294 \ub545\uc744 \uc704(\uc6d0\uc810)\uc5d0\uc11c \ub0b4\ub824\ub2e4\ubcf4\ub294 \ubaa8\uc591\uc73c\ub85c \ubaa8\ub4e0 \uac83\uc744 \uc37c\uae30\ub54c\ubb38\uc5d0… <\/p>\n

Q4: \ub2e4 \ub410\ub294\ub370… \ud3c9\ud589\ud55c \uc9c1\uc120 3\uac1c \uc529\uc774\uc9c0\uc694. \uadf8 \ub9cc\ub098\ub294\uc810\ub4e4\uc740 \uac01\uac01 \ud3c9\ud589\uc0ac\ubcc0\ud615\uc758 \uaf2d\uc9c0\uc810\ub4e4\uc774\uc7ce\uc544\uc694? \uadf8\ub7ec\ub2c8\uae4c \ube44\ub840\uc2dd\ub9cc \uc4f0\uba74 \ub420\ud150\ub370… \uae30\uc6b8\uae30\ub9cc \uad6c\ud574\ubcf4\uba74 \ub418\uc9c0\uc694? <\/p>\n

Q5: \uad50\uacfc\uc11c \uc77d\uc5b4\ubcf4\uba74 \uc54c \uc218 \uc788\uc744\uac70\uc608\uc694. <\/p>\n

Q6: \uc544\ub9c8 \uc548 \ub098\uc62c \uac83 \uac19\uc544\uc694. \ubcf4\uc7a5\uc740 \ubabb\ud568. <\/p>\n

Q7: line at infinity\ub294 \ub2e8\uc9c0 \uc5b4\ub290 \ud3c9\uba74(\uce94\ubc84\uc2a4)\uc5d0 \uadf8\ub9ac\ub294\uac00\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\ub294 \uac83\uc774\uc9c0\uc694. \uadf8\ub9ac\uace0 \ubcf5\ube44\ub294 \uce94\ubc84\uc2a4\ub97c \ubc14\uafd4\ub3c4 \ubcc0\ud558\uc9c0 \uc54a\uace0\uc694… line at infinity \uc5d0\uc11c\ub294 \uac70\ub9ac\uac00 \uc5c6\uc73c\ub2c8\uae4c \ubcf5\ube44\ub97c \uc815\uc758\ud560 \uc218 \uc5c6\uc9c0\ub9cc, \ub2e4\ub978 \uce94\ubc84\uc2a4\ub85c \uc62e\uae30\uba74 line at infinity\uac00 \uc544\ub2c8\ub2c8\uae4c \ubb38\uc81c \uc5c6\uc9c0\uc694. <\/p>\n

Q8: \ub9de\uc544\uc694. V4\ub294 V4\ub85c \uac00\uace0\uc694. <\/p>\n

\n

Q: ms\uc758 \uc9c8\ubb38: <\/p>\n

    \n
  1. \uba3c\uc800 \uc11c\ub85c\ub2e4\ub978 \uc138\uc2e4\uc218 \uc8fc\uc5b4\uc9c8\ub54c 1\ucc28\ubd84\uc218\ud568\uc218\uac00 \uc788\uace0 a->1 b->0 c->\u221e \ub85c \ubcf4\ub0b4\ub294 1\ucc28\ubd84\uc218\ud568\uc218\uac00 \uc720\uc77c\ud568\uc744 \ubcf4\uc774\ub294\uac83\uc744 \uc77c\uc77c\uc774 x\uc5d0 a\ub123\uace0 b\ub97c\ub123\uace0 c\ub97c \ub123\uc744\ub54c \ud568\uc218\uac00 \uac00\uc9c8\uac12\uc5d0 \ub300\ud55c \uc2dd\uc744 \ub9cc\ub4e4\uace0 (\uc608\ub97c\ub4e4\uc5b4 Aa+B\/Ca+D = 1 \uc774\ub7f0\uc2dd\ub4e4..) \uac70\uae30\uc5d0\uc11c \ub2e4\ub978 \ud568\uc218\uac00 \uc788\ub2e4\uace0 \uac00\uc815\ud558\uace0 A’a+B’ \/ C’a+D’ = 1 \uc774\ub7f0\uc2dd\uc744 \uc2dd\uc744 \ub9cc\ub4e4\uace0, \uacb0\uad6d \uc774\ub7f0 \ub17c\ub9ac\uace0 \uc2dd\uc744 \ubcc0\ud615\uc2dc\ucf1c\ubcf4\uba74 A=A’ B=B’ C=C’ D=D’ \uac00 \ub41c\ub2e4. \uc774\ub7f0\uc2dd\uc73c\ub85c \uc99d\uba85\ud558\ub294 \uac74\uac00\uc694? \uc774\ub807\uac8c \ud574\ubcf4\ub2c8 \ub108\ubb34 \ubcf5\uc7a1\ud558\ub358\ub370\uc694. \uc81c\uac00 \uae54\ub054\ud55c \uc99d\uba85\uc774 \uc788\ub294\ub370 \ud5db\ub3c4\ub294 \uae30\ubd84\uc774 \ub4e4\uc5b4\uc11c \ub2e4\ub978 \ubc29\ubc95\uc73c\ub85c\uc758 \uc811\uadfc\ubc29\ubc95\uc774 \uc788\ub294\uc9c0 \uad81\uae08\ud574\uc11c \uc774\ub807\uac8c \uc5ec\ucb48\uc5b4 \ubd05\ub2c8\ub2e4.<\/li>\n
  2. 1\ucc28\ubd84\uc218\uac00 \ubcf5\ube44\ub97c \ubcf4\uc874\ud568\uc744 \ubcf4\uc774\ub77c\ub294 \ubb38\uc81c\uc5d0\uc11c\uc694 1\ucc28\ubd84\uc218\ud568\uc218\uac00 ax+b \/cx+d ( ad-bd \u2260 0) \ub77c\uace0 \uc8fc\uc5b4\uc9c8\ub54c \uc774 \ud568\uc218\ub294 \uc77c\uc885\uc758 \uc0ac\uc601\ubcc0\ud658\uc774\ub77c\uace0 \uc0dd\uac01\ud560\uc218 \uc788\uace0 ( -d\/c \uc778\uc810\uc744 \u221e \ubcf4\ub0b4\ub294 \uc0ac\uc601\ubcc0\ud658..) \uc0ac\uc601\ubcc0\ud658\uc740 \ubcf5\ube44\ub97c \ubcf4\uc874\ud55c\ub2e4\ub294 \uc815\uc758\uc5d0 \uc758\ud574 \ubcf5\ube44\uac00 \ubcf4\uc874\ub41c\ub2e4. \uc774\ub807\uac8c \ud558\ub294\uac83\uc774 \uc62c\ubc14\ub294 \ud574\ub2f5\uc774 \ub420\uc218\uc788\uc744\uae4c\uc694?<\/li>\n
  3. \ub9c8\uc9c0\ub9c9\uc73c\ub85c \uc0ac\uc601\ubcc0\ud658\uc774 \ud569\uc131\uc5d0 \ub2eb\ud600\uc788\uc74c\uc744 \ubcf4\uc774\ub294\uac83\uc774 \uc5b4\ub5a4 A\ub77c\ub294 \ud615\uc0c1\uc744 \uc0ac\uc601\ubcc0\ud658\uc2dc\ucf1c\uc11c \ub9cc\ub4e0 \ud615\uc0c1\uc774 A’\ub77c\uace0 \ud560\ub54c \uc774 \ud615\uc0c1 A’\ub294 \ub610\ub2e4\ub978 A”\ub77c\ub294 \uc0ac\uc601\ubcc0\ud658\uc2dc\ud0a8 \ud615\uc0c1\uc73c\ub85c \ub098\ud0c0\ub0bc\uc218 \uc788\ub2e4\ub294\uac83\uc744 \uc758\ubbf8\ud558\ub294 \uac83\uc778\uc9c0 \uad81\uae08\ud569\ub2c8\ub2e4..<\/li>\n<\/ol>\n

    A: <\/p>\n

      \n
    1. \uc6b0\uc120 \ubb38\uc81c 1\uc740 \uc6d0\uce59\uc801\uc73c\ub85c \uadf8\uac83\uc774 \ub9de\uc544\uc694. \uadf8\ub7f0\ub370 \uadf8 \uc138 \uc870\uac74\ub4e4\uc744 \uac00\uc9c0\uace0 \uc774 \ud568\uc218\ub97c \uc815\ud558\ub824\uace0 \ubcf4\uba74 \ub450 \ubc88\uc9f8 b->0 \uc774\ub77c\ub294 \uc870\uac74\uc5d0\uc11c \ud568\uc218\uc758 \ubd84\uc790 \ubd80\ubd84\uc740 x-b\ub77c\ub294 \uc778\uc218\ub97c \uac00\uc838\uc57c \ud558\uace0, \uc138\ubc88\uc9f8 \uc870\uac74\uc5d0\uc11c \ubd84\ubaa8\ubd80\ubd84\uc740 x-c\ub77c\ub294 \uc778\uc218\ub97c \uac00\uc838\uc57c \ud558\ub2c8\uae4c. \uc774\uc81c \ub098\uba38\uc9c0 \uc870\uac74\uc744 \uac00\uc9c0\uace0 \ud574 \ubcf4\uba74 \ud568\uc218\uac00 \ud558\ub098 \ubfd0\uc784\uc744 \uae08\ubc29 \ubcf4\uc77c \uc218 \uc788\ub294\ub370…<\/li>\n
    2. \ubb38\uc81c 2\uc5d0\uc11c\ub294 \uc544\ub798 \ub9d0\ud55c\ub300\ub85c \ud558\ub824\uba74 1\ucc28\ubd84\uc218\ud568\uc218\uac00 \uc0ac\uc601\ubcc0\ud658\uc774\ub77c\ub294 \uac83\uc744 \uc99d\uba85\ud558\uba74 \ub418\uc9c0\uc694. \ub178\ud2b8\uc5d0 \ub300\ub7b5 \uc788\uc9c0\uc694. \uadf8\ub7ec\uc9c0 \uc54a\uace0 \uc9c1\uc811 \uacc4\uc0b0\ud574\uc11c \ubcf4\uc77c \uc218\ub3c4 \uc788\ub294\ub370… \uc6b0\uc120 1\ucc28\ubd84\uc218\ud568\uc218\ub294 1\/x \ub77c\ub294 \ud568\uc218\uc640 x+a, cx \uaf34\uc758 \ud568\uc218\ub97c \uc801\uc808\ud788 \uc5ec\ub7ec\ubc88 \ud569\uc131\ud574\uc11c \ub9cc\ub4e0 \uac83\uc774\ub2c8\uae4c \uc774 \uc138 \ud568\uc218\uac00 \ubcf5\ube44\ub97c \ubcf4\uc874\ud55c\ub2e4\ub294 \uac83\uc744 \ubcf4\uc5ec\ub3c4 \ub3fc\uc694…<\/li>\n
    3. \uc138 \ubc88\uc9f8 \ubb38\uc81c\ub294 \uc26c\uc6b4\ub370 \uc0ac\uc601\ubcc0\ud658\uc774\ub77c\ub294 \uac83\uc740 \ubc30\uacbd\ubcc0\ud658(\ud22c\uc2dc)\uc744 \uc5ec\ub7ec\ubc88 \ub418\ud480\uc774\ud55c \uac83\uc774\ub2c8\uae4c \uc774\ub7f0 \uac83\uc774 \ub450 \uac1c \uc788\uc5b4\uc11c \ud569\uc131\ud558\uc5ec\ub3c4 \ubc30\uacbd\ubcc0\ud658\uc744 \ud569\ud574\ub193\uc740 \uac83 \ub9cc\ud07c \ub418\ud480\uc774\ud558\ub294 \uac83\uc5d0 \ubd88\uacfc\ud558\uc9c0\uc694. \ub530\ub77c\uc11c \ud569\uc131\uc5d0 \ub300\ud558\uc5ec \ub2eb\ud600\uc788\uc5b4\uc694.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

      Q: ruri\uc758 \uc9c8\ubb38: , A: Q1: \ubb3c\ub860 \ub3fc\uc694. \uadf8\uac83\uc740 V’\uc744 \uc18c\uc2e4\uc810 \uc57d\uac04 \uc55e\uc5d0\uc11c \uc18c\uc2e4\uc810\uc73c\ub85c \uc6c0\uc9c1\uc774\uba74\uc11c \uadf9\ud55c\uc744 \uc0dd\uac01\ud574 \ubcf4\uba74 \uc88c\ubcc0, \uc6b0\ubcc0\uc774 \uac01\uac01 \uc55e\uc758 \uc2dd\uc73c\ub85c \uc218\ub834\ud558\ub2c8\uae4c\uc694. \ub4a4\uc2dd\uc740 \uc815\uc758\ub2c8\uae4c \ubb3c\uc5b4\ubcfc \uac83\ub3c4 \uc5c6\uace0\uc694. Q2: \uce94\ubc84\uc2a4 \ub9d0\uace0 \ub545\uc5d0\uc11c \ub450 \uc9c1\uc120\uc774 \ud3c9\ud589\uc774\ub77c\ub294 \uac83\uc740 \uc11c\ub85c \ub9cc\ub098\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83\uc774\uace0\uc694. \uc0ac\uc601\ud3c9\uba74\uc5d0\uc11c\ub294 \ubaa8\ub4e0 \uc9c1\uc120\uc774 \uc11c\ub85c \ub9cc\ub098\ub2c8\uae50, \ub545\uc5d0\uc11c \uc548\ub9cc\ub098\ub294 \uac83\uc740 \ub2f9\uc5f0\ud788 \ub545\uc5d0 \uc5c6\ub294 \uc810\uc5d0\uc11c \ub9cc\ub09c\ub2e4\ub294 \ub9d0\uc774\uc9c0\uc694. … \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-3376","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\/3376","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=3376"}],"version-history":[{"count":1,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/posts\/3376\/revisions"}],"predecessor-version":[{"id":3377,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/posts\/3376\/revisions\/3377"}],"wp:attachment":[{"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/media?parent=3376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/categories?post=3376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mathematicians.korea.ac.kr\/ywkim\/wp-json\/wp\/v2\/tags?post=3376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}