Let G be a group, and let S be a subset of G. A word in S is any expression of the form
where s1,...,sn are elements of S and each εi is ±1. The number n is known as the length of the word.
Each word in S represents an element of G, namely the product of the expression. By convention, the identity (unique)[3] element can be represented by the empty word, which is the unique word of length zero.
Let G be a group, and let S be a subset of G. A word in S is any expression of the formwhere s1,...,sn are elements of S and each εi is ±1. The number n is known as the length of the word.Each word in S represents an element of G, namely the product of the expression. By convention, the identity (unique)[3] element can be represented by the empty word, which is the unique word of length zero.
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