Surugadai Nihon University Hospital

Quasi‐Factorially Closed Subalgebras of Laurent Polynomial Rings

ABSTRACT Let be a domain and the Laurent polynomial ring over . In this paper we study pre‐factorially closed (pfc) and quasi‐factorially closed (qfc) ‐subalgebras of , which generalize the notion of factorially closed subalgebras. We first establish a localization criterion for...