{"id":7252,"date":"2006-08-22T12:56:00","date_gmt":"2006-08-22T12:56:00","guid":{"rendered":"http:\/\/melotopia.net\/b\/?p=7252"},"modified":"2006-08-22T12:56:00","modified_gmt":"2006-08-22T12:56:00","slug":"%eb%8d%a7%ec%85%88%ea%b3%bc-%ea%b3%b1%ec%85%88","status":"publish","type":"post","link":"http:\/\/melotopia.net\/b\/?p=7252","title":{"rendered":"\ub367\uc148\uacfc \uacf1\uc148"},"content":{"rendered":"<div class=\"desc\">\n        \uc0ac\uce59\uc5f0\uc0b0\uc5d0 \ub300\ud574\uc11c \ub9d0\uc744 \ud558\uc790\uba74, \uac00\uc7a5 \uae30\ubcf8\uc801\uc73c\ub85c \ub367\uc148\uc744 \uc798 \uc815\uc758\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<p>        \uc0ac\uce59\uc5f0\uc0b0\uc740 \ubaa8\ub450 \uc774\ud56d\uc5f0\uc0b0(Binery Operation)\uc774\ub77c\uace0 \ubd80\ub974\ub294 \uacc4\uc0b0\ubc95\uc5d0 \ub4e4\uc5b4\uac00\ub294\ub370, \uc774\ud56d\uc5f0\uc0b0\uc740 \uc9d1\ud569\uc5d0\uc11c \uc6d0\uc18c \ub450\uac1c\ub97c \uace8\ub77c\uc11c \uadf8 \uc9d1\ud569\uc758 \uc6d0\uc18c \ud558\ub098\ub97c \ub300\uc751\uc2dc\ud0a4\ub294 \uaddc\uce59\uc744 \ub9d0\ud569\ub2c8\ub2e4.<\/p>\n<p>        +(a,b)=c<\/p>\n<p>        \ub77c\ub294 \ud615\uc2dd\uc73c\ub85c \ub367\uc148\uc744 \uc815\uc758\ud558\uac8c \ub418\ub294\ub370, \uc774\uac83\uc744 \uac04\ub2e8\ud558\uac8c \uc4f0\uae30 \uc704\ud574\uc11c a+b=c\ub77c\uace0 \uc801\uc2b5\ub2c8\ub2e4.<br \/>\n        <br \/>\n        &#8220;\ub367\uc148\uc774 \uc5b4\ub5a4 \uc9d1\ud569 A\uc5d0\uc11c \uc798 \uc815\uc758\ub418\uc5c8\ub2e4&#8221;\ub294 \ub9d0\uc740 \uc9d1\ud569 A\uc5d0\uc11c \uc544\ubb34 \uc6d0\uc18c \ub450\uac1c\ub97c \uace8\ub77c\uc11c \ub367\uc148\uc744 \ud588\uc744 \ub54c \ud56d\uc0c1 \ub2e4\uc2dc A\ub85c \uadf8 \uacb0\uacfc\uac00 \ub4e4\uc5b4\uac00\ub294 \uacbd\uc6b0\uc5d0 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n<p>        \ub9cc\uc57d \uc5b4\ub5a4 \uc6d0\uc18c  e\uac00 \uc788\uc5b4\uc11c \uc9d1\ud569\uc758 \uc544\ubb34 \uc6d0\uc18c a\uc5d0 \ub300\ud574\uc11c +(a,e)=+(e,a)=a\ub97c \ub9cc\uc871\ud55c\ub2e4\uba74 e\ub97c \ud56d\ub4f1\uc6d0(Identity)\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4. \ud2b9\ubcc4\ud788, \ub367\uc148\uc5d0 \uad00\ud55c \ud56d\ub4f1\uc6d0\uc758 \uc774\ub984\uc744 &#8220;\uc601,0,zero&#8221;\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \uc904\uc5ec\uc11c \uc801\uc73c\uba74 a+e=e+a=a\uc778 e\ub97c 0\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4.<\/p>\n<p>        \ub610\ud55c, \ud2b9\uc815 a\uc5d0 \ub300\ud574 \uc5b4\ub5a4 \uc6d0\uc18c n\uc774 \uc788\uc5b4\uc11c +(a,n)=+(n+a)=e\uac00 \ub098\uc624\ub294 \uacbd\uc6b0\uac00 \uc788\ub294\ub370, \uc774\ub7f0 \uacbd\uc6b0 n\uc744 a\uc758 \ub367\uc148\uc5d0 \uad00\ud55c \uc5ed\uc6d0\uc774\ub77c\uace0 \ubd80\ub974\uace0, -a\ub77c\uace0 \uc801\uc2b5\ub2c8\ub2e4.<\/p>\n<p>        \uacf1\uc148\ub3c4 \ub611\uac19\uc740 \ubc29\ubc95\uc73c\ub85c \uc815\uc758\ud558\ub294\ub370,<br \/>\n        <br \/>\n        x(a,b)=c\ub77c\uace0 \uc815\uc758\ud569\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uacf1\uc148\uc5d0 \uad00\ud55c \ud56d\ub4f1\uc6d0\uc744 1\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4. a\uc5d0 \ub300\ud55c \uacf1\uc148\uc758 \uc5ed\uc6d0\uc740 1\/a\ub77c\uace0 \uc801\uc2b5\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \uc544\ubb34\ud2bc, \uc774\ud56d\uc5f0\uc0b0 \ud558\ub098\uac00 \uc798 \uc815\ud574\uc838 \uc788\uace0, \uacb0\ud569\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uba74\uc11c, \ud56d\ub4f1\uc6d0\uacfc \ubaa8\ub4e0 \uc6d0\uc18c\uc5d0 \uc5ed\uc6d0\uc774 \uc874\uc7ac\ud558\uba74 \uadf8\ub7f0 \uc9d1\ud569\uc744 \uad70Group\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \uc5ec\uae30\uc11c \uc911\uc694\ud55c\uac74 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud560 \ud544\uc694\ub294 \uc5c6\ub2e4\ub294 \uac81\ub2c8\ub2e4. \uad50\ud658\ubc95\uce59\ub3c4 \uc131\ub9bd\ud558\ub294 \uad70\uc740 \uac00\ud658\uad70, \ub610\ub294 \uc544\ubca8 \uad70\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \uad50\ud658\ubc95\uce59\uc740 a+b=b+a\uac00 \ubaa8\ub4e0 a, b\uc5d0 \ub300\ud574\uc11c \uc131\ub9bd\ud560 \ub54c \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud55c\ub2e4\uace0 \ub9d0\ud569\ub2c8\ub2e4.<\/p>\n<p>        \uc6b0\ub9ac\uac00 \uc798 \uc54c\uace0 \uc788\ub294 &#8220;\uc22b\uc790&#8221;\ub77c\uace0 \ubd80\ub974\ub294 \uac83\ub4e4\uc740 \ubaa8\ub450 \uad50\ud658\ubc95\uce59\uc774 \uc798 \uc131\ub9bd\ud558\ub294 \uac00\ud658\uad70\uc744 \uc774\ub8e8\uace0 \uc788\uace0, \ub367\uc148\uacfc \uacf1\uc148 \uc5ed\uc2dc \uc6b0\ub9ac\uac00 \uc54c\uace0 \uc788\ub294 \uadf8\ub300\ub85c \uc798 \uc815\uc758\ub429\ub2c8\ub2e4. \ubb3c\ub860 \uc22b\uc790 0\uacfc \uc22b\uc790 1\uc740 \uac01\uac01 \ub367\uc148\uacfc \uacf1\uc148\uc5d0 \ub300\ud55c \ud56d\ub4f1\uc6d0\uc785\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \ud558\uc9c0\ub9cc \uc22b\uc790\uac00 \uc544\ub2cc \uc5ec\ub7ec\uac00\uc9c0 \ub300\uc0c1\ub4e4\ub3c4 \uad70\uc744 \uc774\ub8f0 \uc218 \uc788\ub294\ub370, \uc22b\uc790 \ub9d0\uace0\ub3c4 \uc774\ub7f0 \uac83\ub4e4\uc774 \ub9ce\uc774 \uc788\ub2e4\ub294 \uc810\uc744 \uc54c\uc544\ub450\uba74 \ub429\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uadf8\ub7f0 \ub300\uc0c1\uc911\uc5d0\uc11c\ub294 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub294 \uac83\uc774 \ud6e8\uc52c \ub354 \ub9ce\uc774 \uc788\uc2b5\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \uacb0\ud569\ubc95\uce59\uc740 \uc774\ud56d\uc5f0\uc0b0\uc744 \ucc98\ub9ac\ud558\ub294 \uc21c\uc11c\ub97c \ubc14\uafc0 \uc218 \uc788\ub2e4\ub294 \ubc95\uce59\uc778\ub370, \uad73\uc774 \uc4f0\uc790\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4<\/p>\n<p>        +(a,+(b,c))=+(+a,b),c) \uc774\uace0, \uc774\uac83\uc744 \uac04\ub2e8\ud558\uac8c \uc4f0\uba74 a+(b+c)=(a+b)+c\ub77c\uace0 \uc501\ub2c8\ub2e4.<\/p>\n<p>        \ubb3c\ub860 \uc6b0\ub9ac\uac00 \uc544\ub294 \ub300\ubd80\ubd84\uc758 \uc774\ud56d\uc5f0\uc0b0\ub4e4\uacfc \ub300\ubd80\ubd84\uc758 \uc9d1\ud569\uc740 \uacb0\ud569\ubc95\uce59\uc744 \uc798 \ub9cc\uc871\ud569\ub2c8\ub2e4.<\/p>\n<p>        \ubd84\ubc30\ubc95\uce59\uc740 \uc774\ud56d\uc5f0\uc0b0\uc774 \ub450\uac1c \uc774\uc0c1 \uc815\uc758\ub41c \uacbd\uc6b0\uc5d0 \uc774\ud56d\uc5f0\uc0b0\uc758 \uc21c\uc11c\ub97c \ubc14\uafc0 \uc218 \uc788\ub2e4\ub294 \ubc95\uce59\uc785\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ubcf4\ud1b5\uc758 \uad70\uc740 \uc774\ud56d\uc5f0\uc0b0\uc774 1\uac1c\ub9cc \uc815\uc758\ub418\uc5b4\ub3c4 \ub418\uae30 \ub54c\ubb38\uc5d0 \uc774\ud56d\uc5f0\uc0b0\uc774 \ub450\uac1c\uac00 \uc798 \uc815\uc758\ub41c \uc9d1\ud569\uc744 \uc0dd\uac01\ud574\uc57c \ud569\ub2c8\ub2e4. \uadf8\ub798\uc11c \ub367\uc148\uacfc \uacf1\uc148\uc744 \ud55c\uaebc\ubc88\uc5d0 \uc0dd\uac01\ud558\ub294 \uacbd\uc6b0\uac00 \uc788\ub294\ub370, \uc774\ub7ec\ud55c \uc9d1\ud569\uc744 \ud658Ring\uc774\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4.<br \/>\n        <br \/>\n        \uc815\ud655\ud788\ub294, \uc5b4\ub5a4 \uc9d1\ud569\uc774 \ud658\uc774 \ub418\uae30 \uc704\ud574\uc11c\ub294 \ub367\uc148\uc5d0 \ub300\ud574\uc11c\ub294 \uac00\ud658\uad70\uc774\uace0 \uacf1\uc148\uc774 \uc798 \uc815\uc758\ub418\uc5b4\uc57c \ud558\uace0, \ubd84\ubc30\ubc95\uce59\uc774 \uc798 \uc131\ub9bd\ud574\uc57c\ub9cc \ud569\ub2c8\ub2e4. \ud55c\uac00\uc9c0 \ud2b9\uc9d5\uc740, \uacf1\uc148\uc5d0 \ub300\ud574\uc11c \uc5ed\uc6d0\uc774 \uc874\uc7ac\ud560 \ud53d\uc694\uac00 \uc5c6\uace0 \uacf1\uc148\uc5d0 \ub300\ud574\uc11c\ub294 \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uc9c0 \uc54a\ub354\ub77c\ub3c4 \uc0c1\uad00 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n<p>        \ubd84\ubc30\ubc95\uce59\uc740 \ub367\uc148+\uacfc \uacf1\uc148*\uc5d0 \ub300\ud574\uc11c \ub2e4\uc74c\uacfc \uac19\uc774 \uc4f8 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/p>\n<p>        *(a,+(b,c))=+(*(a,b),*(a,c))\uc774\uace0 \uac04\ub2e8\ud558\uac8c \uc4f0\uba74 a*(b+c)=(a*b)+(a*c)\ub77c\uace0 \uc501\ub2c8\ub2e4.<\/p>\n<p>        \ub9cc\uc57d \uacf1\uc148\uc5d0 \ub300\ud574\uc11c \uad50\ud658\ubc95\uce59\uc774 \uc131\ub9bd\ud558\uace0 \ub367\uc148\uc758 \ud56d\ub4f1\uc6d0\uc744 \uc81c\uc678\ud55c \ubaa8\ub4e0 \uc6d0\uc18c\uc5d0 \ub300\ud574\uc11c \uacf1\uc148\uc5d0 \ub300\ud55c \uc5ed\uc6d0\uc774 \uc874\uc7ac\ud55c\ub2e4\uba74 \uc774\ub7f0 \uc9d1\ud569\uc744 \uccb4FIeld\ub77c\uace0 \ubd80\ub985\ub2c8\ub2e4.<\/p>\n<p>        \uc720\ub9ac\uc218, \uc2e4\uc218, \ubcf5\uc18c\uc218 \ub4f1\uc740 \ubaa8\ub450 \uccb4\ub97c \uc774\ub8e8\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>        \uc0ac\uce59\uc5f0\uc0b0\uc911\uc5d0\uc11c \ub450\uac00\uc9c0\ub97c \uc815\uc758\ud588\ub294\ub370, \ube84\uc148\uc740 \uc5b4\ub5a4 \uc218\uc758 \ub367\uc148\uc5d0 \uad00\ud55c \uc5ed\uc6d0\uc744 \ub354\ud558\ub294 \uac83\uc73c\ub85c \uc0dd\uac01\ud560 \uc218 \uc788\uace0, \ub098\ub217\uc148\uc740 \uc5b4\ub5a4 \uc218\uc758 \uacf1\uc148\uc5d0 \uad00\ud55c \uc5ed\uc6d0\uc744 \uacf1\ud558\ub294 \uac83\uc73c\ub85c \uc0dd\uac01\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc5d0 \uc798 \uc815\uc758\ub429\ub2c8\ub2e4. \ub2e8, \ub367\uc148\uc5d0 \ub300\ud55c \ud56d\ub4f1\uc6d0\uc740 \uacf1\uc148\uc5d0 \uad00\ud55c \uc5ed\uc6d0\uc774 \uc5c6\uae30 \ub54c\ubb38\uc5d0 0\uc73c\ub85c \ub098\ub204\ub294 \uc77c\uc740 \ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n<p>        \uc774\ub7ec\ud55c \uc131\uc9c8\ub4e4\uc744 \uc774\uc6a9\ud558\uba74 \uc22b\uc790\ub4e4\uc774 \uac16\uace0 \uc788\ub294 \uc5ec\ub7ec\uac00\uc9c0 \ud2b9\uc131\uc744 \uc798 \uc774\ud574\ud560 \uc218 \uc788\uac8c \ub429\ub2c8\ub2e4.<\/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=14\" onclick=\"window.open(this.href, 'tistoryThisBlogPopup', 'width=550, height=510, toolbar=no, menubar=no, status=no, scrollbars=no'); return false;\"><br \/>\n<img data-recalc-dims=\"1\" decoding=\"async\" alt=\"\uc2e0\uace0\" src=\"https:\/\/i0.wp.com\/t1.daumcdn.net\/tistory_admin\/static\/ico\/ico_spam_report.png\" style=\"border:0\"\/><br \/>\n<\/a>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\uc0ac\uce59\uc5f0\uc0b0\uc5d0 \ub300\ud574\uc11c \ub9d0\uc744 \ud558\uc790\uba74, \uac00\uc7a5 \uae30\ubcf8\uc801\uc73c\ub85c \ub367\uc148\uc744 \uc798 \uc815\uc758\ud574\uc57c \ud569\ub2c8\ub2e4. \uc0ac\uce59\uc5f0\uc0b0\uc740 \ubaa8\ub450 \uc774\ud56d\uc5f0\uc0b0(Binery Operation)\uc774\ub77c\uace0 \ubd80\ub974\ub294 \uacc4\uc0b0\ubc95\uc5d0 \ub4e4\uc5b4\uac00\ub294\ub370, \uc774\ud56d\uc5f0\uc0b0\uc740 \uc9d1\ud569\uc5d0\uc11c \uc6d0\uc18c \ub450\uac1c\ub97c \uace8\ub77c\uc11c \uadf8 \uc9d1\ud569\uc758 \uc6d0\uc18c \ud558\ub098\ub97c \ub300\uc751\uc2dc\ud0a4\ub294 \uaddc\uce59\uc744 \ub9d0\ud569\ub2c8\ub2e4. +(a,b)=c \ub77c\ub294 \ud615\uc2dd\uc73c\ub85c \ub367\uc148\uc744 \uc815\uc758\ud558\uac8c \ub418\ub294\ub370, \uc774\uac83\uc744 \uac04\ub2e8\ud558\uac8c \uc4f0\uae30 \uc704\ud574\uc11c a+b=c\ub77c\uace0 \uc801\uc2b5\ub2c8\ub2e4. &#8220;\ub367\uc148\uc774 \uc5b4\ub5a4 \uc9d1\ud569 A\uc5d0\uc11c \uc798 \uc815\uc758\ub418\uc5c8\ub2e4&#8221;\ub294 \ub9d0\uc740 \uc9d1\ud569 A\uc5d0\uc11c \uc544\ubb34 \uc6d0\uc18c \ub450\uac1c\ub97c \uace8\ub77c\uc11c \ub367\uc148\uc744 [&hellip;]<\/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":[2],"tags":[],"class_list":["post-7252","post","type-post","status-publish","format-standard","hentry","category-academic"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8o6gA-1SY","jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/7252","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=7252"}],"version-history":[{"count":0,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=\/wp\/v2\/posts\/7252\/revisions"}],"wp:attachment":[{"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7252"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/melotopia.net\/b\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}