{"id":8974,"date":"2010-03-04T11:56:00","date_gmt":"2010-03-04T11:56:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=8974"},"modified":"2010-03-04T11:56:00","modified_gmt":"2010-03-04T11:56:00","slug":"%eb%9d%bc%ea%b7%b8%eb%9e%91%ec%a7%80%ec%95%88-3","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=8974","title":{"rendered":"\ub77c\uadf8\ub791\uc9c0\uc548? (3)"},"content":{"rendered":"
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\n<br \/>\n<\/title><br \/>\n<meta content=\"OpenOffice.org 3.1 (Linux)\" name=\"GENERATOR\"><\/p>\n<style type=\"text\/css\">\n <!--\n\t\t@page { margin: 2cm }\n\t\tP { margin-bottom: 0.21cm }\n\t-->\n <\/style>\n<p style=\"margin-bottom: 0cm;\">\n<font color=\"#000000\"><br \/>\n \uc774 \uc2dd\uc744 \uc798<br \/>\n\uacc4\uc0b0\ud558\uba74 \ub418\ub294\ub370<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n ,<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n<\/font>\n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n<font color=\"#000000\"><br \/>\n<font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n $\\frac{dS}{d\\alpha}\\right|_{\\alpha=0}<br \/>\n= frac{d}{d\\alpha}\\int L(v(\\alpha,t),x(\\alpha,t);t)dt$<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n<\/font>\n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n<font color=\"#000000\"><br \/>\n \uc0dd\uac01\ud574\ubcf4\ub2c8<br \/>\n\uc774\uac74 \uadf8\ub0e5 \uc5f0\uc2b5\ubb38\uc81c\uc774\ubbc0\ub85c \uc774 \uae00\uc5d0\uc11c\ub294 \uc790\uc138\ud55c \uc124\uba85\uc740<br \/>\n\uc0dd\ub7b5\ud55c\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n .<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \uc0ac\uc2e4<br \/>\n\uc218\uc2dd \uc4f0\uae30\uac00 \uadc0\ucc2e\uc558\ub2e4\uac70\ub098 \ud558\ub294 \uc774\uc720\ub294 \uc544\ub2c8\ub77c\uace0 \uc0dd\uac01\ud574<br \/>\n\uc8fc\uc790<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n .<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \ubbf8\ubd84\uc744<br \/>\n\uc798 \ud574\uc8fc\uace0<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n ,<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \ubd80\ubd84\uc801\ubd84\uc744<br \/>\n\ud55c\ubc88 \ud574\uc8fc\uace0<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n ,<br \/>\n$\\eta$<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \ub85c \ubb36\uc5b4\uc900 \ud6c4 \uacbd\uacc4\uc870\uac74\uc744 \uc801\uc6a9\ud558\uba74<br \/>\n\ub41c\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n .<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \uadf8\ub7fc<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n $\\eta$<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \uac00<br \/>\n\uc5b4\ub5bb\uac8c \ub420\uc9c0 \uc544\ubb34\ub3c4 \ubaa8\ub974\uc9c0\ub9cc \uadf8\ub7fc\uc5d0\ub3c4 \ubd88\uad6c\ud558\uace0 \ub2f5\uc774<br \/>\n\ub098\uc640\uc57c \ud558\uae30 \ub54c\ubb38\uc5d0<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n ,<br \/>\n$x(t)$<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n \uac00 \uc5b4\ub5a4 \uc870\uac74\uc744 \ub9cc\uc871\ud574\uc57c \ud558\ub294\uc9c0<br \/>\n\uc54c\uc544\ub0bc \uc218 \uc788\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n<span lang=\"ko-KR\"><br \/>\n .<br \/>\n <\/span><br \/>\n<\/font><br \/>\n<\/font><br \/>\n<\/font>\n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n<font color=\"#000000\"><br \/>\n<font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n $\\frac{\\partial<br \/>\nL}{\\partial x} – \\frac{d}{dt} \\frac{\\partial L}{\\partial \\dot{x}}=0$<br \/>\n <\/font><br \/>\n<\/font><br \/>\n<\/font>\n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n<font color=\"#000000\"><br \/>\n \ubc14\ub85c \uc774 \uacf5\uc2dd\uc778\ub370<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n ,<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \uc774\uac83\uc740 \uad49\uc7a5\ud788 \uc911\uc694\ud558\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n .<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \uc678\uc6cc\ub450\ub354\ub77c\ub3c4 \uba39\uace0\uc0ac\ub294\ub370 \uc9c0\uc7a5\uc774 \uc5c6\uc744 \uc815\ub3c4\ub85c<br \/>\n\uc911\uc694\ud55c \uacf5\uc2dd\uc774\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n .<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \uc704\uc758<br \/>\n\ubc29\uc815\uc2dd\uc744 \ub9cc\uc871\ud558\ub294<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n $x(t)$<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \ub294<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n S<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \ub97c \ucd5c\uc18c\ud654 \uc2dc\ud0ac \uc218<br \/>\n\uc788\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n . (<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \uc774 \uc2dd\uc744 \ub9cc\uc871\ud558\ub294<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n x(t)<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \uac00 \uc65c<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n S<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \ub97c<br \/>\n\ucd5c\uc18c\ud654 \uc2dc\ud0a4\ub294\uc9c0\ub294<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n ,<br \/>\n <\/font><br \/>\n<\/font><br \/>\n \ub300\uc785\ud574\uc11c<br \/>\n\ubbf8\ubd84\ud574\ubcf4\uba74 \ub41c\ub2e4<br \/>\n <font face=\"\uc740\"><br \/>\n<font size=\"3\"><br \/>\n .)<br \/>\n <\/font><br \/>\n<\/font><br \/>\n<\/font>\n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n \uc911\uc694\ud55c\uac74 \uc774 \uacf5\uc2dd\uc774 \uc720\ub3c4\ub418\ub294 \uacfc\uc815\uc774 \uc544\ub2c8\ub2e4. \uc0ac\uc2e4 \uc5ec\uae30\uae4c\uc9c0\ub294 \ub2e8\uc21c\ud788 \uc218\ud559\uc774\uace0, \ub530\ub77c\uc11c \uc544\uc9c1 “\ubb3c\ub9ac”\ub77c\uace0 \ubd80\ub974\ub294 \uac83\uc740 \uc804\ud600 \ub098\uc624\uc9c0 \uc54a\uc558\ub2e4. \ubb3c\ub9ac\ud559\uc774 \ub418\ub824\uba74 \uc774\uc81c \uc774 \uacf5\uc2dd\uc774 \ud604\uc2e4\uc5d0\uc11c \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ub418\ub294\uc9c0, \ud604\uc2e4\uc744 \uc5b4\ub5bb\uac8c \ud45c\ud604\ud558\ub294\uc9c0 \uc598\uae30\ud574\uc57c \ud55c\ub2e4.\n <\/p>\n<p style=\"margin-bottom: 0cm;\">\n \ubb3c\ub9ac\ud559\uc774 \ubb58 \ud558\ub294 \ud559\ubb38\uc778\uc9c0 \uc78a\uc5b4\uba39\uace0 \uc788\uc5c8\ub294\ub370, \ub2e4\uc2dc \ud55c\ubc88 \uc0dd\uac01\ud574\ubcf4\uc790. \uc6b0\ub9ac\ub294 \ubb34\uc5c7\uc744 \ubb3c\ub9ac\ud559\uc774\ub77c\uace0 \ubd80\ub974\ub098? \uc0ac\uc2e4\uc740 \uc774 \uc138\uc0c1\uc5d0\uc11c \uc77c\uc5b4\ub098\ub294 \ud604\uc0c1\ub4e4\uc740 \ubaa8\ub450 \ubb3c\ub9ac \ubc95\uce59\uc744 \ub530\ub974\ub294 \uac83\uc73c\ub85c \uad00\ucc30\ub41c\ub2e4. “\ud604\uc0c1(Phenomenon)”\uc774\ub780 \ub610 \ubb58\uae4c? \uc6b0\ub9ac\uac00 \uad00\ucc30\ud558\uace0 \uc788\ub294 \ubaa8\ub4e0 \uac83\uc774\ub2e4. \uc774\ub807\uac8c \ub9d0\ud558\uba74 \uc21c\ud658\ub17c\ub9ac\uc778 \uac83 \uac19\uc73c\ub2c8\uae4c \uc5ec\uae30\uae4c\uc9c0\ub9cc \ud558\uace0, \uc5b4\uca0c\ub4e0 \ubb3c\ub9ac\ud559\uc774 \ubb54\uc9c0 \uc798 \uc0dd\uac01\ud574 \ubcf4\uba74 \uc5b4\ub5a4 \uad00\ucc30 \ub300\uc0c1\uc5d0 \ub300\ud574\uc11c, \uadf8 \uad00\ucc30 \ub300\uc0c1\uc744 \ud45c\ud604\ud558\ub294 \uc218 \uba87\uac1c\ub97c \uc798 \uc815\uc758\ud55c \ud6c4 \uadf8 \uc218\ub4e4\uc774 \uc5b4\ub5bb\uac8c \ubcc0\ud574 \ub098\uac00\ub294\uc9c0 \uc54c\uc544\ub0b4\ub294 \uac83\uc774\ub2e4.<br \/>\n <sup class=\"footnote\"><br \/>\n<a href=\"#footnote_1800_1\" id=\"footnote_link_1800_1\" onmouseout=\"tistoryFootnote.hide(1800,1)\" onmouseover=\"tistoryFootnote.show(this,1800,1)\" style=\"color:#f9650d;font-family:Verdana,Sans-serif\"><br \/>\n<span style=\"display:none\"><br \/>\n [\uac01\uc8fc:<br \/>\n <\/span><br \/>\n 1<br \/>\n <span style=\"display:none\"><br \/>\n ]<br \/>\n <\/span><br \/>\n<\/a><br \/>\n<\/sup><br \/>\n \uc774\uc81c \ubb3c\ub9ac\ud559\uc774 \uc5b4\ub5a4\uac74\uc9c0 \uc815\ud588\uc73c\ub2c8\uae4c, \uc5ec\uae30\ub2e4\uac00 \ubb3c\ub9ac\ud559\uc744 \uc5b4\ub5bb\uac8c \ub07c\uc6cc\ub123\uc744\uc9c0 \uc0dd\uac01\ud574 \ubd10\uc57c \ud55c\ub2e4. \ubb3c\ub9ac\ud559\uc5d0\uc11c S\ub77c\ub294 \uac12\uc774 \uc788\ub2e4\uace0 \ud560 \ub54c, \uc6b0\ub9ac\ub294 \uc5ec\uae30\uc5d0 “\ubb3c\ub9ac \ubc95\uce59”\uc774\ub77c\ub294 \uc774\ub984\uc73c\ub85c \ud558\ub098\uc758 \uaddc\uce59\uc744 \ub123\ub294\ub2e4. \uadf8\uac83\uc740 “\uc6b0\ub9ac\uac00 \uad00\ucc30\ud558\ub294 \ub300\uc0c1\uc744 \ud45c\ud604\ud558\ub294 \uc218\ub4e4\uc740 S\ub97c \ucd5c\uc18c\ud654 \ud558\ub294 \ubc29\ud5a5\uc73c\ub85c \ubcc0\ud654\ud574 \ub098\uac04\ub2e4”\ub294 \uac83\uc774\ub2e4. \uadf8\ub0e5 S\ub77c\uace0\ub9cc \ubd80\ub974\uba74 \uc7ac\ubbf8\uac00 \uc5c6\uc73c\ub2c8\uae4c \uc5ec\uae30\uc5d0 \uc774\ub984\uc744 \ubd99\uc5ec\uc8fc\uc790. \uadf8 \uc774\ub984\uc740 “\uc791\uc6a9(Action)”\uc774\ub2e4. \uadf8\ub9ac\uace0 \uc774 \uaddc\uce59\uc758 \uc774\ub984\uc744 “\ucd5c\uc18c \uc791\uc6a9\uc758 \uc6d0\ub9ac(Least action principle)”\ub77c\uace0 \ubd80\ub978\ub2e4.<br \/>\n \n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n \ubb3c\ub9ac\ud559\uc5d0\uc11c S\ub77c\uace0 \ubd80\ub974\ub294 \uac12\uc774 \uc788\ub2e4\uace0 \ud558\uba74, \uc218\ud559\uc5d0\uc11c \uc6d0\ub798 \uadf8 S\ub97c \uc5b4\ub5a4 \ud568\uc218\uc758 \uc801\ubd84\uc73c\ub85c \uc815\uc758\ud588\uc5c8\uae30 \ub54c\ubb38\uc5d0 \ubb3c\ub9ac\ud559\uc5d0\uc11c\ub3c4 \uadf8\uac83\uc5d0 \ud574\ub2f9\ud558\ub294 \uc5b4\ub5a4 \ud568\uc218\uac00 \uc788\uc744 \uac83\uc774\ub2e4. \uadf8 \ud568\uc218\ub97c L\uc774\ub77c\uace0 \ubd80\ub974\uc790.<br \/>\n <sup class=\"footnote\"><br \/>\n<a href=\"#footnote_1800_2\" id=\"footnote_link_1800_2\" onmouseout=\"tistoryFootnote.hide(1800,2)\" onmouseover=\"tistoryFootnote.show(this,1800,2)\" style=\"color:#f9650d;font-family:Verdana,Sans-serif\"><br \/>\n<span style=\"display:none\"><br \/>\n [\uac01\uc8fc:<br \/>\n <\/span><br \/>\n 2<br \/>\n <span style=\"display:none\"><br \/>\n ]<br \/>\n <\/span><br \/>\n<\/a><br \/>\n<\/sup><br \/>\n \uc6b0\ub9ac\ub294 \ud604\uc0c1\uc774 “\uc2dc\uac04”\uc5d0 \ub530\ub77c \ubcc0\ud558\ub294 \uac83\uc744 \uad00\ucc30\ud558\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0 L\uc758 \ubcc0\uc218\ub294 \uc2dc\uac04\uc774 \ub420 \uac83\uc774\ub2e4. \uadf8\ub9ac\uace0 \uacb0\uc815\uc801\uc73c\ub85c L\uc5d0 \ub123\uc5b4\uc11c \uc6b0\ub9ac\uac00 \uc54c\uace0 \uc2f6\uc740 \uac12\uc774 \ubb54\uc9c0\ub97c \uc815\ud574\uc57c \ud558\ub294\ub370, \uadf8\uac83\uc740 \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 \uc704\uce58\uc640 \uc18d\ub3c4\uac00 \ub41c\ub2e4. \uadf8\ub0e5 x\uc640 v\ub77c\uace0 \ubd80\ub974\uc790. \uadf8\ub7fc \uc774\uc81c L\uc774 x\uc640 v\uc758 \ud568\uc218\uc774\uae34 \ud55c\ub370, \uc5b4\ub5a4 \ud568\uc218\uc778\uc9c0\ub97c \uc54c\uc544\uc57c \ud55c\ub2e4. \uc544\ubb34\ub9ac \ub77c\uadf8\ub791\uc9c0\uc548\uc774 \uc804\uac00\uc758 \ubcf4\ub3c4\ub77c \ud558\ub354\ub77c\ub3c4 \uc5b4\ub5bb\uac8c \uc0dd\uacbc\ub294\uc9c0 \ubaa8\ub978\ub2e4\uba74 \uc544\ubb34 \ubb38\uc81c\ub3c4 \ud480 \uc218 \uc5c6\ub2e4. \uc6b0\ub9ac\uac00 \uad00\ucc30\ud558\uace0 \uc788\ub294 \uacc4\uc758 \ub77c\uadf8\ub791\uc9c0\uc548\uc744 \uc54c\uc544\ub0b4\uc57c \ud560 \uac83\uc774\ub2e4. \uadf8\ub7fc \ub3c4\ub300\uccb4 \ub77c\uadf8\ub791\uc9c0\uc548\uc774\ub780 \ubb54\ub370? \uc65c \ub77c\uadf8\ub791\uc9c0\uc548\uc744 L=T-V\ub85c \uc815\uc758\ud558\ub294\uac78\uae4c?<br \/>\n \n<\/p>\n<p style=\"margin-bottom: 0cm;\">\n (\ub2e4\uc74c \uae00\uc5d0 \uc774\uc5b4\uc11c…)\n <\/p>\n<p style=\"margin-bottom: 0cm;\">\n\n<\/p>\n<p> (\uae00\uc774 \uc5b4\ub824\uc6b4\uc9c0 \uc26c\uc6b4\uc9c0 \uc0b0\uc73c\ub85c \uac00\uace0 \uc788\ub294\uc9c0 \uc77d\uace0 \uc788\ub294 \ubd84\uc774 \uc788\ub2e4\uba74 \ub313\uae00\uc880 \ub2ec\uc544\uc8fc\uc138\uc694…)<\/p>\n<p><a href=\"http:\/\/www.ks.uiuc.edu\/Services\/Class\/PHYS480\/qm_PDF\/chp1.pdf\" target=\"_blank\" title=\"[http:\/\/www.ks.uiuc.edu\/Services\/Class\/PHYS480\/qm_PDF\/chp1.pdf]\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.\"><br \/>\n http:\/\/www.ks.uiuc.edu\/Services\/Class\/PHYS480\/qm_PDF\/chp1.pdf<br \/>\n <\/a><br \/>\n<br \/>\n \uc0c1\uc138\ud55c \uc218\ud559 \uacf5\uc2dd\uc758 \uc720\ub3c4\ub294 \uc774 \ubb38\uc11c\ub97c \uc77d\uc5b4\ubcf4\uba74 \uc88b\uc744 \uac83 \uac19\ub2e4.<br \/>\n <\/p>\n<p style=\"margin-bottom: 0cm;\">\n<div class=\"footnotes\">\n<ol class=\"footnotes\">\n<li id=\"footnote_1800_1\">\n \uc774\ub7f0\uc2dd\uc73c\ub85c \ubb3c\ub9ac\ud559\uc744 \uc815\uc758\ud558\uace0 \ud574\uc11d\ud558\ub294 \uac83\uc5d0 \ub300\ud574\uc11c\ub294 \uc5ec\ub7ec\uac00\uc9c0 \uc758\uacac\uc774 \uc788\uc744 \uc218 \uc788\uace0, \ub0b4 \uc815\uc758\ub098 \ud574\uc11d\uc774 \uc804\uc801\uc73c\ub85c \uc62c\ubc14\ub974\uc9c0 \uc54a\uc744 \uc218 \uc788\ub2e4. \uc544\ubb34\ud2bc \uadf8\ub807\ub2e4 \ud558\ub354\ub77c\ub3c4 \ub0b4 \uc815\uc758\uac00 \uad73\uc774 \uc9c4\ub9ac\uc5d0\uc11c \ub9ce\uc774 \ud2c0\ub9ac\uc9c0\ub294 \uc54a\uc558\uc744 \uac83\uc774\ub2e4.<br \/>\n <a href=\"#footnote_link_1800_1\"><br \/>\n [\ubcf8\ubb38\uc73c\ub85c]<br \/>\n <\/a>\n<\/li>\n<li id=\"footnote_1800_2\">\n \uac11\uc790\uae30, \uc2ac\ub808\uc774\uc5b4\uc988 \uc18c\uc124\ud310 \uc791\uac00 \ud6c4\uae30\uc5d0 \ub098\uc624\ub294 S\uc640 L\uc774 \uc0dd\uac01\ub0ac\ub2e4. \uadf8\ub4e4\uc774 \ub204\uad6c\uc778\uc9c0 \uc544\uc2dc\ub294 \ubd84\uc774\ub77c\uba74 S\uc758 \uadfc\uc6d0\uc774 L\uc774\ub77c\ub294 \uac83\ub3c4 \uc544\uc2dc\ub9ac\ub77c \uc0dd\uac01\ud55c\ub2e4.<br \/>\n <a href=\"#footnote_link_1800_2\"><br \/>\n [\ubcf8\ubb38\uc73c\ub85c]<br \/>\n <\/a>\n<\/li>\n<\/ol>\n<\/div>\n<p><script type=\"text\/javascript\">\n tistoryFootnote.add(1800,1,\"\\uc774\\ub7f0\\uc2dd\\uc73c\\ub85c \\ubb3c\\ub9ac\\ud559\\uc744 \\uc815\\uc758\\ud558\\uace0 \\ud574\\uc11d\\ud558\\ub294 \\uac83\\uc5d0 \\ub300\\ud574\\uc11c\\ub294 \\uc5ec\\ub7ec\\uac00\\uc9c0 \\uc758\\uacac\\uc774 \\uc788\\uc744 \\uc218 \\uc788\\uace0, \\ub0b4 \\uc815\\uc758\\ub098 \\ud574\\uc11d\\uc774 \\uc804\\uc801\\uc73c\\ub85c \\uc62c\\ubc14\\ub974\\uc9c0 \\uc54a\\uc744 \\uc218 \\uc788\\ub2e4. \\uc544\\ubb34\\ud2bc \\uadf8\\ub807\\ub2e4 \\ud558\\ub354\\ub77c\\ub3c4 \\ub0b4 \\uc815\\uc758\\uac00 \\uad73\\uc774 \\uc9c4\\ub9ac\\uc5d0\\uc11c \\ub9ce\\uc774 \\ud2c0\\ub9ac\\uc9c0\\ub294 \\uc54a\\uc558\\uc744 \\uac83\\uc774\\ub2e4.\");\ntistoryFootnote.add(1800,2,\"\\uac11\\uc790\\uae30, \\uc2ac\\ub808\\uc774\\uc5b4\\uc988 \\uc18c\\uc124\\ud310 \\uc791\\uac00 \\ud6c4\\uae30\\uc5d0 \\ub098\\uc624\\ub294 S\\uc640 L\\uc774 \\uc0dd\\uac01\\ub0ac\\ub2e4. \\uadf8\\ub4e4\\uc774 \\ub204\\uad6c\\uc778\\uc9c0 \\uc544\\uc2dc\\ub294 \\ubd84\\uc774\\ub77c\\uba74 S\\uc758 \\uadfc\\uc6d0\\uc774 L\\uc774\\ub77c\\ub294 \\uac83\\ub3c4 \\uc544\\uc2dc\\ub9ac\\ub77c \\uc0dd\\uac01\\ud55c\\ub2e4. \");\n <\/script><\/p>\n<div style=\"width:100%;margin-top:30px;clear:both;height:30px\">\n<div style=\"width:31px;float:left;\">\n<a href=\"\/toolbar\/popup\/abuseReport\/?entryId=1800\" onclick=\"window.open(this.href, 'tistoryThisBlogPopup', 'width=550, height=510, toolbar=no, menubar=no, status=no, scrollbars=no'); return false;\"><br \/>\n<img decoding=\"async\" alt=\"\uc2e0\uace0\" src=\"\/\/t1.daumcdn.net\/tistory_admin\/static\/ico\/ico_spam_report.png\" style=\"border:0\"\/><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p><\/meta><br \/>\n<\/meta>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc774 \uc2dd\uc744 \uc798 \uacc4\uc0b0\ud558\uba74 \ub418\ub294\ub370 , $\\frac{dS}{d\\alpha}\\right|_{\\alpha=0} = frac{d}{d\\alpha}\\int L(v(\\alpha,t),x(\\alpha,t);t)dt$ \uc0dd\uac01\ud574\ubcf4\ub2c8 \uc774\uac74 \uadf8\ub0e5 \uc5f0\uc2b5\ubb38\uc81c\uc774\ubbc0\ub85c \uc774 \uae00\uc5d0\uc11c\ub294 \uc790\uc138\ud55c \uc124\uba85\uc740 \uc0dd\ub7b5\ud55c\ub2e4 . \uc0ac\uc2e4 \uc218\uc2dd \uc4f0\uae30\uac00 \uadc0\ucc2e\uc558\ub2e4\uac70\ub098 \ud558\ub294 \uc774\uc720\ub294 \uc544\ub2c8\ub77c\uace0 \uc0dd\uac01\ud574 \uc8fc\uc790 . \ubbf8\ubd84\uc744 \uc798 \ud574\uc8fc\uace0 , \ubd80\ubd84\uc801\ubd84\uc744 \ud55c\ubc88 \ud574\uc8fc\uace0 , $\\eta$ \ub85c \ubb36\uc5b4\uc900 \ud6c4 \uacbd\uacc4\uc870\uac74\uc744 \uc801\uc6a9\ud558\uba74 \ub41c\ub2e4 . \uadf8\ub7fc $\\eta$ \uac00 \uc5b4\ub5bb\uac8c \ub420\uc9c0 \uc544\ubb34\ub3c4 \ubaa8\ub974\uc9c0\ub9cc \uadf8\ub7fc\uc5d0\ub3c4 \ubd88\uad6c\ud558\uace0 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