Tate-Betti and Tate-Bass numbers

Published 25 Mar 2018 in math.KT and math.AC | (1803.09301v1)

Abstract: We define Tate-Betti and Tate-Bass invariants for modules over a commutative noetherian local ring R. Then we show the periodicity of these invariants provided that R is a hypersurface. In case R is also Gorenstein, we show that a finitely generated R-module M and its Matlis dual have the same Tate-Betti and Tate-Bass numbers.

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