Klaus Dohmen http://arxiv.org/abs/1004.3416 Chordalã°ã©ãã®ã¯ãªã¼ã¯ã®æã«å¯¾ãã¦ï¼Bonferroniã®ä¸çå¼ã®ãããªãã®ãæãç«ã¤ï¼ã¨ãããã¨ãè¨ã£ã¦ããï¼ããããå é¤åçã¯çä½ (ball) ã®contractibilityã¨åããã¨ããã£ã¦ããããªãã®ãªã®ã§ï¼chordalã°ã©ãã®ã¯ãªã¼ã¯è¤ä½ãcontractibleã§ããã¨ãããã¨ãç¥ã£ã¦ããã° (ããã¯ç§ãé¢é£ããè«æãæ¸ããEdelman-Reiner ('00) ã®çµæã§ãã)ï¼ãã®è«æã®çµæã¯ãã»ã©é©ãã§ã¯ãªãï¼ã¨æãï¼ Russell Impagliazzo, Valentine Kabanets http://eccc.hpi-web.de/report/2010/072/ ãã¦ï¼é¢æ£æ°å¦ã«ããã確çè«çææ³ã®åéã«ããã¦ãconstructive proofããæè¿æ³¨

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