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3Â¥2015-11-23 07:54:25
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Edstrater ´óÉñµÄ´ð°¸ÎÞÒÉÊÇÕýÈ·µÄ£¬ÎÒÀ´°ËØÔÒ»ÏÂÌâÄ¿±³ºóµÄÒâͼ¡£ µÚÒ»ÎÊÆäʵÊÇÀ´×ÔErdős¨CGallai theorem£¬ Ëü¸ø³öÒ»¸öµÝ¼õÕýÕûÊýÐòÁÐÄܹ»×÷Ϊij¸ö¼òµ¥Í¼(simple graph) µÄdegree sequence µÄ³ä·Ö±ØÒªÌõ¼þ£¬Á¬½Ó https://en.wikipedia.org/wiki/Erd%C5%91s%E2%80%93Gallai_theorem ËùÒÔ£¬¿ÉÄÜÓеÄÊ÷Ò¶(leaf) ¸öÊý¿ÉÒÔΪ 0,2,4,6¡£ ¾ßÌå¿ÉÒÔ¿´¸½¼þµÄͼƬ (µ±È»£¬Í¼»µÄºÜÄÑ¿´£¬Â¥Ö÷¶à¶à°üº£¬Ð»Ð»À²£© µÚ¶þÎÊ£¬¿ÉÒԲο¼¸½¼þÖеÄHavel-Hakimi-Berge ¶¨Àí£º¸ø¶¨degree sequence, ËùÓпÉÄܵÄͼ±ØÐëÊÇ2-switchµÈ¼ÛµÄ¡£ Âú×ãÌâÄ¿ÖÐÌõ¼þµÄͼÄÇÊÇÏ൱µÄ¶à£¬Â¥Ö÷ÂýÂý»°É¡£ ÎÊÌâµÄÀ§ÄѵãÔÚÓÚ£¬Ã»ÓÐʲôºÃµÄ°ì·¨»òÀíÂÛÅж¨Á½¸öͼÊÇ·ñͬ¹¹¡£ temp1.png temp2.png |

4Â¥2015-11-23 10:52:35
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@Edstrayer ¸Õ·¢ÍêÌû×Ó£¬·¢ÏÖ¾ÓÈ»°Ñ Edstrayer ×¼°æÖ÷´óÉñ µÄÃû×ÖÆ´´íÁË£¬·Ç³£·Ç³£¶Ô²»Æð°¡£¬¾´ÇëÁ½⡣ ÁíÍ⣬¹ØÓÚ2-switch, ¿ÉÒԲο¼ÎÄÕ http://homepages.math.uic.edu/~mubayi/papers/newdraft.pdf http://compalg.inf.elte.hu/~tony/Oktatas/TDK/FINAL/Chap%202.PDF |

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