Buchsbaum modules and parameter ideals under flat extensions

Nguyen Thi Hong Loan, Le Thanh Nhan, Pham Hung Quy

Let $(R,\mathfrak{m})$ and $(S,\mathfrak{n})$ be commutative Noetherian local rings, let $\phi :R\to S$ be a flat local homomorphism. In this paper, we first characterize the ascent and descen…