Mathematical Research Letters
Volume 16 (2009)
Separating invariants for modular $P$-groups and groups acting diagonally
Pages: 1029 – 1036
We study separating algebras for rings of invariants of finite groups. We describe a separating subalgebra for invariants of $p$-groups in characteristic $p$ using only transfers and norms. Also we give an explicit construction of a finite separating set for invariants of groups acting diagonally.