Dear Forum,
I have explicitly given a finitely generated
(non-abelian) free group G,
a finite index subgroup H,
and a finite index normal subgroup of H, called N.
(N is is in general not normal in G.)
(H and N are given as finitely generated subgroups of G).

Now my question:
Can GAP check if the intersection of H with
the normal closure of N in G is equal to N?

Thanks

Phil

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