83.4 KazhdanLusztigMue

KazhdanLusztigMue( W, y, w [, ly, lw ] )

given elements y and w in the Coxeter group W, this function returns the coefficient of degree (l(w)-l(y)-1)/2 of the Kazhdan-Lusztig polynomial corresponding to y and w. The optional variables ly and lw contain the length of y and w, respectively.

Of course, the result of this function could also be obtained by

KazhdanLusztigCoefficient( W, y, w, ly, lw, (lw - ly -1)/2)

but there are some speed-ups compared to this general function.

This function requires the package "chevie" (see RequirePackage). Previous Up Top Next
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