p-local module (source code)

= p-local module

A p-local <module> here is a finite <direct sum> of <induced representations> from <normalizers> $N_G(Q)$ of nontrivial <p-subgroups> $Q$. This usage includes induction from $G$ itself when $G$ normalizes such a <subgroup>. <Green correspondence> and induction on vertex order express every finite <module>, or lattice over a complete <valuation ring>, as a difference of p-local <modules> after adjoining <projective modules>.