Supplementary Note on 'Rational Invariants of Certain Orthogonal and Unitary Groups'
Supplementary Note on 'Rational Invariants of Certain Orthogonal and Unitary Groups'
Given a field k and a finite group G acting on the rational function field k(X1, …, Xn) as a group of k-automorphisms, an important Noether's problem asks whether the invariant subfield [forumal] is purely transcendental over k. 1991 Mathematics Subject Classification 12F20, 20G40.