A Characterization of Permutation Modules Extending a Theorem of Weiss
A Characterization of Permutation Modules Extending a Theorem of Weiss
Let G be a finite p -group with normal subgroup N . A celebrated theorem of A. Weiss gives a sufficient condition for a \mathbb{Z}_pG -lattice to be a permutation module, looking only at its restriction to N and its N -fixed points. In case N has order p , …