[GAP Forum] Hilbert series for invariants

[sooolato]

Dear GAP forum,

I have two questions:

How can we compute Hilbert series for an invariant ring K[V]^G in the modular case since we cannot use Molien's formula?

If we have Hilbert series for an invariant ring and we have a set of invariants {x_1, .... , x_n} that we suspect it is a complete generating set, how can we compute Hilbert series for K [x_1, ..., x_n} in order to know it is a generating set or not?

Thank you

Salorita