I know about the computation of Kazhdan-Lusztig basis and change between "T"
and "C"-basis using GAP3. But how can I compute the $h$-polynomials as defined
in
$$c_xc_y = \sum_{z \in W}h_{x,y,z}c_z,$$
for any $x,y,z$ in a Coxeter group $W$, using GAP3?
Or, how can I compute the $f$-polynomials as defined in
$$T_xT_y = \sum_{z \in W}f_{x,y,z}T_z.$$
using GAP3?
This is the first time I send an email to this forum, so please forgive me if
there is any improperness.in my language or manner. Thanks.
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