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2009-8-9(æ¥)(14:00-18:00) æ±äº¬é½ (ç§èå ææ)ããã¹ãï¼ P. Selinger, "A survey of graphical languages for monoidal categories" 5 Lemma 4.11 ãã (http://www.mscs.dal.ca/~selinger/papers/graphical.pdf) 交éã¢ã¯ã»ã¹ï¼ é½å¶æ°å®¿ç·å²©æ¬çºé§ ãJRâ¦