Title: Gorenstein algebras and Hochschild cohomology

Abstract:

For homomorphism K-->S of commutative rings, where K is Gorenstein and
S is essentially of finite type and flat as a K-module, the property  
that all
non-trivial fiber rings of the homomorphism are Gorenstein is  
characterized in terms of
properties of the Hochschild cohomology of S over K, with  
coefficients in the bimodule
S^e.

Authors: L. L. Avramov and S. Iyengar