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Dear Forum,

first, many thanks to Tim Hsu for answering my initial question

on free groups. Now, I have a little problem with the implementation.

Let F be a finitely generated free group and H a finite index subgroup

of F, given by finitely many generators (words in F).

The command FactorCosetOperation(F,H) works well, but what I need

is something like

FactorCosetOperation(F, NormalClosure(F,H)),

but NormalClosure(F,H) doesn't work.

What can I do?

Phil

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