The Degree of the Special Linear Characters of a Rank Two Free Group
نویسنده
چکیده
Given a word W in the free group on 2 letters F2, Horowitz showed that the special linear character of W is an integer polynomial in the 3 characters of the basic words of F2. Special linear characters are defined via the trace of their representations, and the polynomial character of an arbitrary W can be found by application of certain “trace relations”, which allow one to write the character of a complicated word as a sum of products of the characters of simpler words. Even in the n = 2 case, where the polynomial is uniquely defined, this procedure can be difficult and tedious. In this note, we use the structure of a free group word in F2 to compute the degree and the leading monomial of its SL(2, C)-character without actually computing the full polynomial. ======== To appear in Geometriae Dedicata ========
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تاریخ انتشار 2009