²é¿´: 4161  |  »Ø¸´: 4
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

ÖÁÓ½

Ìú³æ (³õÈëÎÄ̳)

[ÇóÖú] ÉèA,B¾ùΪn½×¾ØÕó,ÇÒAB=BA,ÇóÖ¤:r(A+B)<=r(A)+r(B)-r(AB)

Sample Text
±¾ÈË´óÒ»±¾¿ÆÉú£¬Çó½âÒ»µÀÏßÐÔ´úÊýÌâ
Sample Text
ÉèA,B¾ùΪn½×¾ØÕó,ÇÒAB=BA,ÇóÖ¤:r(A+B)<=r(A)+r(B)-r(AB)
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

¾­ÊÀÖ®µÀÐÄϵÌìÏÂ
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

webbery

½ð³æ (ÕýʽдÊÖ)

A \cap B½âÊÍÈçÏÂ
ÉèAµÄÁÐÏòÁ¿×é³É¿Õ¼ä S1£¬BµÄÁÐÏòÁ¿×é³É¿Õ¼äS1£¬ÔòA \cap B¾ÍÊÇÕâÁ½¸ö¿Õ¼ä½»µÄ²¿·Ö£¬Ò²¾ÍÊÇA£¬B¡°¹²ÓС±µÄÄDz¿·ÖÏòÁ¿×é³ÉµÄ¿Õ¼ä£¬»òÕß˵¿ÉÒÔ»¥ÏàÏßÐÔ±í³öÄDz¿·ÖÏòÁ¿×é³ÉµÄ¿Õ¼ä¡£

ÕâÏÂ
r(A+B)<=r(A)+r(B)-r(A \cap B)  ÄÜÀí½âÁ˰ɡ£Àí½âÁËÕâÀºóÃæ¾ÍÄÜÀí½âÁË¡£
5Â¥2012-12-12 00:13:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 5 ¸ö»Ø´ð

webbery

½ð³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
Ö¤Ã÷ÔÚ¸½¼þÀÔÚ¸½¼þÀ²»ÖªµÀҪд¼¸¸ö×Ö²ÅÄÜͨ¹ý
2Â¥2012-12-11 12:18:43
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

webbery

½ð³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï
ÖÁÓ½: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú, ¶ÔÓÚA \\ cap B µÄÒýÈ뻹ÊDz»Ì«Àí½â£¬²»¹ýÌṩµÄ´ð°¸»¹ÊǺÜÓаïÖú 2012-12-11 21:59:21
ÒªÖ¤Ã÷r(A+B)<=r(A)+r(B)-r(AB)£¬¼´Ö¤Ã÷r(A+B)+r(AB)<=r(A)+r(B)
ÏÔ¶øÒ×¼ûr(A+B)<=r(A)+r(B)-r(A \cap B) ,¼´ r(A+B)+ r(A \cap B)<=r(A)+r(B)
ÆäÖÐ r(A \cap B)±íʾA,BÐÐ(ÁÐ)ÏòÁ¿×é³ÉµÄ¿Õ¼äÖ®½»
´ËʱֻҪ֤Ã÷r(AB)<= r(A \cap B)¼´¿É¡£

¶øAB=BA£¬ËùÒÔAB¿ÉÒÔÓÉA»òBÈÎÒ»¾ØÕóµÄÐУ¨ÁУ©ÏòÁ¿ÏßÐÔ±í³ö£¬ËùÒÔr(AB)<= r(A \cap B)
Ö¤±Ï
3Â¥2012-12-11 12:24:02
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

webbery

½ð³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

ÖÁÓ½: »ØÌûÖö¥ 2012-12-12 20:53:12
д´íÁËÒ»ÐÐ
"r(A \cap B)±íʾA,BÐÐ(ÁÐ)ÏòÁ¿×é³ÉµÄ¿Õ¼äÖ®½»"
ӦΪ
A \cap B±íʾA,BÐÐ(ÁÐ)ÏòÁ¿×é³ÉµÄ¿Õ¼äÖ®½»
4Â¥2012-12-11 12:25:27
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 274Çóµ÷¼Á +5 ʱ¼äµã 2026-03-13 5/250 2026-03-17 07:34 by ÈÈÇéɳĮ
[¿¼ÑÐ] 326Çóµ÷¼Á +4 ŵ±´¶û»¯Ñ§½±êéê 2026-03-15 7/350 2026-03-16 17:11 by ŵ±´¶û»¯Ñ§½±êéê
[»ù½ðÉêÇë] ½ñÄêµÄ¹ú»ù½ðÊÇ´ò·ÖÖÆÂ𣿠50+3 zhanghaozhu 2026-03-14 3/150 2026-03-16 17:07 by ±±¾©À³ÒðÈóÉ«
[¿¼ÑÐ] Ò»Ö¾Ô¸ËÕÖÝ´óѧ²ÄÁϹ¤³Ì£¨085601£©×¨Ë¶ÓпÆÑо­ÀúÈýÏî¹ú½±Á½¸öʵÓÃÐÍרÀûÒ»ÏîÊ¡¼¶Á¢Ïî +3 ´ó»ðɽС»ðɽ 2026-03-16 5/250 2026-03-16 16:54 by barlinike
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á +6 ÄÝÄÝninicgb 2026-03-15 9/450 2026-03-16 16:40 by houyaoxu
[¿¼²©] »¶Ó­É격ͬѧÁªÏµ +3 ÌìµÀ³êÇÚ2026686 2026-03-10 7/350 2026-03-15 19:03 by ÌìµÀ³êÇÚ2026686
[¿¼ÑÐ] 070305Çóµ÷¼Á +3 mlpqaz03 2026-03-14 4/200 2026-03-15 11:04 by peike
[¿¼ÑÐ] 308 085701 ËÄÁù¼¶ÒѹýÇóµ÷¼Á +7 ÎÂÇÇÇÇÇÇÇÇ 2026-03-12 14/700 2026-03-14 10:49 by JourneyLucky
[¿¼ÑÐ] 311Çóµ÷¼Á +8 zchqwer 2026-03-10 8/400 2026-03-14 00:01 by JourneyLucky
[¿¼ÑÐ] ²ÄÁϹ¤³Ìµ÷¼Á +9 ßäßä¿Õ¿Õ 2026-03-12 9/450 2026-03-13 22:05 by ÐÇ¿ÕÐÇÔÂ
[¿¼ÑÐ] 290Çóµ÷¼Á +9 ADT 2026-03-11 9/450 2026-03-13 21:55 by JourneyLucky
[¿¼ÑÐ] 315Çóµ÷¼Á +9 СÑòСÑò_ 2026-03-11 10/500 2026-03-13 21:13 by SXNUÀîÀÏʦ
[¿¼ÑÐ] 332Çóµ÷¼Á +3 Zz°æ 2026-03-13 3/150 2026-03-13 20:36 by 18595523086
[¿¼ÑÐ] ²ÄÁÏר˶274Ò»Ö¾Ô¸ÉÂÎ÷ʦ·¶´óѧÇóµ÷¼Á +4 Ñ¦ÔÆÅô 2026-03-13 4/200 2026-03-13 10:40 by ѧԱ8dgXkO
[¿¼ÑÐ] 274Çóµ÷¼Á0856²ÄÁÏ»¯¹¤ +12 z2839474511 2026-03-11 13/650 2026-03-13 10:39 by peike
[¿¼ÑÐ] 081200-11408-276ѧ˶Çóµ÷¼Á +3 ´Þwj 2026-03-12 4/200 2026-03-12 19:33 by Çóµ÷¼Ázz
[¿¼ÑÐ] 420Çóµ÷¼Á +4 ĪÏòÍâÇó11 2026-03-10 6/300 2026-03-12 14:41 by ruiyingmiao
[¿¼²©] ¶Á²©ÉêÇë +5 ¸Ðdd 2026-03-10 7/350 2026-03-11 17:02 by QGZDSYS
[¿¼ÑÐ] »¯¹¤0817µ÷¼Á +8 ²ÓÈôÐdz¿ 2026-03-10 8/400 2026-03-10 22:44 by ÐÇ¿ÕÐÇÔÂ
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á +3 Èýdd. 2026-03-10 3/150 2026-03-10 15:45 by peike
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û