http:\/\/melotopia.net\/b\/?p=9218<\/a><\/p>\n\uc65c \uadf8\ub807\uac8c \ub418\ub294 \uac83\uc77c\uae4c?<\/p>\n
\ud478\ub9ac\uc5d0 \ubcc0\ud658\uc5d0\uc11c \ub300\ud45c\uc801\uc73c\ub85c \ub098\ud0c0\ub098\ub294 \ud604\uc0c1\uc778\ub370, \uc77c\ub2e8 \uc774\ub807\uac8c \uc0b4\ud3b4\ubcf4\uc790. \uac00\ub839 \ud30c\ub77c\ubbf8\ud130\ub97c x\ub77c\uace0 \uc7a1\ub294\ub2e4\uba74, x\uc758 \uc8fc\uae30\uc5d0 \ud574\ub2f9\ud558\ub294 k\uac00 \uc874\uc7ac\ud558\uc5ec x\uc640 k \uc0ac\uc774\uc5d0\ub294 \ubd88\ud655\uc815\uc131 \uad00\uacc4\uac00 \uc131\ub9bd\ud55c\ub2e4. \uc65c \uadf8\ub807\uac8c \ub418\ub294 \uac83\uc77c\uae4c? x\ub97c \ub098\ud0c0\ub0b4\ub294 \uc5f0\uc0b0\uc790\ub294 x\uadf8 \uc790\uccb4\uc774\uace0, \uac19\uc740 \uacf5\uac04\uc5d0\uc11c k\ub97c \ub098\ud0c0\ub0b4\ub294 \uc5f0\uc0b0\uc790\ub294 d\/dx\uac00 \ub418\uc5b4\uc11c x\uc640 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294\ub2e4.<\/p>\n
\uc591\uc790\uc5ed\ud559\uc5d0\uc11c \ud3ec\uad04\uc801\uc73c\ub85c \ubcf4\uba74 \ub450 \uc5f0\uc0b0\uc790 \uc0ac\uc774\uc758 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\ub290\ub0d0 \uc544\ub2c8\ub0d0\uac00 \ubd88\ud655\uc815\uc131 \uad00\uacc4\uac00 \uc788\ub290\ub0d0 \uc544\ub2c8\ub0d0\ub97c \uc815\ud558\ub294 \uc6d0\uc778\uc774\ub2e4. \uc704\uc758 \uc774\uc57c\uae30\uc640 \uac19\uc774 \uc0dd\uac01\ud574 \ubcf8\ub2e4\uba74, \uc5b4\ub5a4 \ub450 \uc5f0\uc0b0\uc790 \uc0ac\uc774\uc5d0 \uc30d\ub300 \uad00\uacc4\uac00 \uc131\ub9bd\ud55c\ub2e4\uba74 \ubc18\ub4dc\uc2dc \uadf8 \ub450 \uc5f0\uc0b0\uc790\ub294 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294\ub2e4\ub294 \ub73b\uc774\ub2e4.<\/p>\n
\uadf8\ub798\uc11c…\ub300\uccb4 \uc65c \uadf8\ub807\uac8c \ub418\ub294 \uac83\uc77c\uae4c?<\/p>\n
\uc591\uc790\uc5ed\ud559\uc5d0\uc11c \uc5f0\uc0b0\uc790\ub4e4\uc740 \uadf8 \uc790\uccb4\ub85c \ubca1\ud130 \uacf5\uac04\uc744 \uc774\ub8ec\ub2e4. (\uc880 \ub354 \uc815\ud655\ud788 \ub9d0\ud558\uba74 Lie algebra\ub77c\ub294 \ub300\uc218\uc801 \uad6c\uc870\ub97c \uac16\ub294\ub370 \uadf8\ub807\uac8c\uae4c\uc9c0 \uc5b4\ub835\uac8c \uc774\uc57c\uae30\ud558\uace0 \uc2f6\uc9c0\ub294 \uc54a\ub2e4.) \uadf8\ub7fc, \uc5ec\uae30\uc11c \uc30d\ub300\uc131\uc740 \uc5b4\ub5bb\uac8c \uc815\uc758\ud560 \uc218 \uc788\uc744\uae4c? \ubca1\ud130\uacf5\uac04\uc5d0\uc11c \uadf8 \ubca1\ud130\uacf5\uac04\uc5d0 \ub300\uc751\ub418\ub294 \uc30d\ub300\uacf5\uac04\uc744 \ucc3e\uc544\ub0b4\ub824\uba74 \uadf8 \ubca1\ud130\uc5d0 \ub300\ud574\uc11c \uc120\ud615 \ubc94\ud568\uc218(Linear functional)\ub97c \ucc3e\uc544\ub0b4\uba74 \ub41c\ub2e4. \uc5ec\uae30\uc11c \ub9d0\ud558\ub294 \uc120\ud615 \ubc94\ud568\uc218\ub780 \ubca1\ud130\uacf5\uac04\uc758 \uc6d0\uc18c\ub85c\ubd80\ud130 \uc2e4\uc218\ub97c \ud558\ub098 \uac00\uc838\ub2e4 \uc8fc\ub294 \uc5f0\uc0b0\uc774 \ub41c\ub2e4. \uac00\ub839, \uc6b0\ub9ac\uac00 \ud754\ud788 \uc0dd\uac01\ud558\ub294 3\ucc28\uc6d0 \ubca1\ud130 \uacf5\uac04\uc758 \ubca1\ud130 v\uc5d0 \ub300\ud574\uc11c\ub294, “\uc5b4\ub5a4 \ubca1\ud130 w\ub97c \uac00\uc838\ub2e4\uac00 \ub0b4\uc801\ud558\ub294 \uc5f0\uc0b0”\uc774 \uc30d\ub300\uc778 \ubca1\ud130\uac00 \ub418\uace0, \uc774\ub7f0 \uc5f0\uc0b0\ub4e4\uc744 \ubaa8\uc544\ub454 \uacf5\uac04\uc774 \uc30d\ub300\uacf5\uac04\uc73c\ub85c \uad6c\uc131\ub41c\ub2e4. \ubb3c\ub860 \uc30d\ub300\uacf5\uac04\uc740 \ubca1\ud130\uacf5\uac04\uc774\ub2e4. \uadf8\ub9ac\uace0 \uc30d\ub300\uacf5\uac04\uc758 \uc30d\ub300\uacf5\uac04\uc740 \uc6d0\ub798\uc758 \ubca1\ud130\uacf5\uac04\uc774\ub2e4.<\/p>\n
\uc591\uc790\uc5ed\ud559\uc5d0\uc11c \uc0ac\uc6a9\ud558\ub294 \uc0c1\ud0dc\uacf5\uac04\uc778 \ud790\ubca0\ub974\ud2b8 \uacf5\uac04 \uc5ed\uc2dc \uadf8 \uc30d\ub300\ub97c \uac16\uace0 \uc788\ub294\ub370, \ube0c\ub77c \uacf5\uac04\uacfc \ucf13 \uacf5\uac04\uc774 \ubc14\ub85c \uadf8 \uc608\uac00 \ub41c\ub2e4. \uadf8 \ub458\uc740 \uc11c\ub85c \uc30d\ub300\uc778 \uacf5\uac04\uc774 \ub41c\ub2e4. \uc774 \uacf5\uac04\uc5d0 \uc791\uc6a9\ud558\ub294 \uc5f0\uc0b0\uc790\uac00 \uc591\uc790\uc5ed\ud559\uc5d0\uc11c \uc0ac\uc6a9\ud558\uace0 \uc788\ub294 \uadf8 \uc5f0\uc0b0\uc790\ub4e4\uc774\ub2e4. \uac00\uc7a5 \uc720\uba85\ud55c \uc5f0\uc0b0\uc790 \uc911 \ud558\ub098\uc778 \uc0ac\ub2e4\ub9ac \uc5f0\uc0b0\uc790 A\uc640 A+\ub97c \uc0dd\uac01\ud574 \ubcf4\uc790. \uc5ec\uae30\uc11c A\ub294 \uc18c\uba78 \uc5f0\uc0b0\uc790\uc774\uace0 A+\ub294 \uc0dd\uc131 \uc5f0\uc0b0\uc790\uc774\ub2e4. \uae30\ud638\uac00 \uc5b4\uc0c9\ud558\uaca0\uc9c0\ub9cc \uadf8\ub807\ub2e4 \uce58\uc790. A\uc640 A+\uac00 \uc788\uc744 \ub54c, \ub458 \uc0ac\uc774\uc5d0 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294 \uac83\uc740 \uc720\uba85\ud55c \uc0ac\uc2e4\uc774\ub2e4. \ub458\uc740 \uc30d\ub300\uc778\uac00? \uadf8\ub807\ub2e4. \uc5b4\ub5bb\uac8c \uc30d\ub300\uc778\uac00? A\uac00 \ucf13 \uacf5\uac04\uc5d0\uc11c \uc18c\uba78 \uc5f0\uc0b0\uc790\ub85c \uc791\uc6a9\ud55c\ub2e4\uace0 \ud558\uba74, A+\uac00 \ucf13 \uacf5\uac04\uc5d0 \uc791\uc6a9\ud560 \ub54c\ub294 \uc0dd\uc131 \uc5f0\uc0b0\uc790\uaca0\uc9c0\ub9cc A+\ub97c \ube0c\ub77c \uacf5\uac04\uc5d0 \uc801\uc6a9\ud558\uba74 \uc18c\uba78 \uc5f0\uc0b0\uc790\ub85c \uc791\uc6a9\ud55c\ub2e4. \uadf8 \ubc18\ub300\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\ub2e4. \uc5f0\uc0b0\uc790\uc758 \uc30d\ub300\ub294 \uc774\ub7f0 \uc758\ubbf8\uc5d0\uc11c \uc30d\ub300\ub85c \uc0dd\uac01\ud560 \uc218 \uc788\uc744 \uac83\uc774\ub2e4.<\/p>\n
\uc704\uc758 x\uc640 k\uc5f0\uc0b0\uc790\uc5d0\uc11c\ub3c4 \ub9c8\ucc2c\uac00\uc9c0 \uad00\uacc4\uac00 \uc131\ub9bd\ud558\ub294\ub370, \ub9cc\uc57d \uc704\uce58 \uacf5\uac04\uc778 x\uc5d0 \ub300\ud574\uc11c \ud30c\ub3d9\ud568\uc218\ub97c \ub098\ud0c0\ub0c8\ub2e4\uba74 k\uc5f0\uc0b0\uc790\ub294 d\/dx\uac00 \ub41c\ub2e4. \ubc18\ub300\ub85c, \uadf8\uc758 \uc30d\ub300\uacf5\uac04\uc778 \uc8fc\ud30c\uc218 \uacf5\uac04 k\uc5d0 \ub300\ud574\uc11c \ud30c\ub3d9\ud568\uc218\ub97c \ub098\ud0c0\ub0c8\ub2e4\uba74, x\uc5f0\uc0b0\uc790\uac00 \ubc18\ub300\ub85c d\/dk\ub85c \ubcc0\uc2e0\ud55c\ub2e4. (\ucc38\uace0\ub85c \uc774 \uad00\uacc4\ub294 \uc0ac\ub2e4\ub9ac \uc5f0\uc0b0\uc790\uc778 A\uc640 A+\uc5d0 \ub300\ud574\uc11c\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc131\ub9bd\ud55c\ub2e4.)<\/p>\n
\uc790, \uc774\uc57c\uae30\uc758 \ubcf8\uc9c8\ub85c \ub3cc\uc544\uc640 \ubcf4\uc790. \uc5b4\uc9f8\uc11c \uc30d\ub300\uc778 \uc5f0\uc0b0\uc790\ub4e4 \uc0ac\uc774\uc5d0\uc11c\ub294 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294 \uac83\uc77c\uae4c? \ubb3c\ub860 \uc608\uc678\ub294 \ub9ce\uc774 \uc788\ub2e4. \uc544\ubb34\uac83\ub3c4 \ud558\uc9c0 \uc54a\ub294 \ud56d\ub4f1 \uc5f0\uc0b0\uc790(Identity)\uc758 \uacbd\uc6b0 \uc30d\ub300\uc778 \uc5f0\uc0b0\uc790\uac00 \uc790\uae30 \uc790\uc2e0\uc774\ubbc0\ub85c \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud55c\ub2e4. \ub610\ud55c, \uc790\uae30 \uc218\ubc18 \uc5f0\uc0b0\uc790(Self adjoint operator)\uc758 \uacbd\uc6b0\uc5d0\ub3c4 \uc30d\ub300\uc778 \uc5f0\uc0b0\uc790\uac00 \uc790\uae30 \uc790\uc2e0\uc774\ubbc0\ub85c \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud55c\ub2e4. \uadf8\ub807\ub2e4\uba74, \uc9c8\ubb38\uc744 \ubc14\uafd4\ubd10\uc57c \ud55c\ub2e4. \uc790\uae30 \uc218\ubc18 \uc5f0\uc0b0\uc790\uac00 \uc544\ub2cc \uc5f0\uc0b0\uc790\ub4e4\uc740 \uadf8 \uc30d\ub300 \uc5f0\uc0b0\uc790\uc640 \uc808\ub300\ub85c \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294\uac00?<\/p>\n
\uc5b4\ub5a4 \uc5f0\uc0b0\uc790 B\uac00 B=B+\uc778 \uacbd\uc6b0\ub294 \ub458\uc774 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud55c\ub2e4\ub294 \uac83\uc774 \uc790\uba85\ud558\ubbc0\ub85c, \uadf8 \uc5ed\uc73c\ub85c B\uac00 B+\uc640 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud55c\ub2e4\uba74 B=B+\uc774\uc5b4\uc57c\ub9cc \ud55c\ub2e4\ub294 \uac83\uc744 \uc99d\uba85\ud558\uba74 \uc704\uc758 \uc774\uc57c\uae30\uac00 \ud544\uc694\ucda9\ubd84\uc870\uac74\uc774 \ub41c\ub2e4.<\/p>\n
\uc5b4\ub5bb\uac8c \uc99d\uba85\ud558\uc9c0? (\ub2e4\uc74c\uc5d0 \uc774\uc5b4\uc11c…)<\/p>\n","protected":false},"excerpt":{"rendered":"
\uc9c0\ub09c \uae00\uc5d0\uc11c \uc30d\ub300\uc778 \uad00\uacc4\uc5d0 \uc788\ub294 \ubcc0\uc218\ub4e4 \uc0ac\uc774\uc5d0\uc11c\ub294 \ubd88\ud655\uc815\uc131 \uad00\uacc4\uac00 \uc131\ub9bd\ud55c\ub2e4\uace0 \uc5b8\uae09\ud55c \uc801\uc774 \uc788\ub2e4. http:\/\/melotopia.net\/b\/?p=9218 \uc65c \uadf8\ub807\uac8c \ub418\ub294 \uac83\uc77c\uae4c? \ud478\ub9ac\uc5d0 \ubcc0\ud658\uc5d0\uc11c \ub300\ud45c\uc801\uc73c\ub85c \ub098\ud0c0\ub098\ub294 \ud604\uc0c1\uc778\ub370, \uc77c\ub2e8 \uc774\ub807\uac8c \uc0b4\ud3b4\ubcf4\uc790. \uac00\ub839 \ud30c\ub77c\ubbf8\ud130\ub97c x\ub77c\uace0 \uc7a1\ub294\ub2e4\uba74, x\uc758 \uc8fc\uae30\uc5d0 \ud574\ub2f9\ud558\ub294 k\uac00 \uc874\uc7ac\ud558\uc5ec x\uc640 k \uc0ac\uc774\uc5d0\ub294 \ubd88\ud655\uc815\uc131 \uad00\uacc4\uac00 \uc131\ub9bd\ud55c\ub2e4. \uc65c \uadf8\ub807\uac8c \ub418\ub294 \uac83\uc77c\uae4c? x\ub97c \ub098\ud0c0\ub0b4\ub294 \uc5f0\uc0b0\uc790\ub294 x\uadf8 \uc790\uccb4\uc774\uace0, \uac19\uc740 \uacf5\uac04\uc5d0\uc11c k\ub97c \ub098\ud0c0\ub0b4\ub294 \uc5f0\uc0b0\uc790\ub294 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10987","post","type-post","status-publish","format-standard","hentry","category-diary"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-2Rd","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/10987","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10987"}],"version-history":[{"count":7,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/10987\/revisions"}],"predecessor-version":[{"id":10994,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/10987\/revisions\/10994"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10987"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}