Tree Representations of Non-symmetric Gr
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Charles Semple; Mike Steel
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Article
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1999
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Elsevier Science
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English
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Let X be a finite set and let d be a function from X = X into an arbitrary group G G. An example of such a function arises by taking a tree T whose vertices ลฝ include X, assigning two elements of G G to each edge of T one for each . ลฝ . orientation of the edge , and setting d i, j equal to the produ