City Research Online

Abstract

© 2018 Mathematical Sciences Publishers. We identify a class of symmetric algebras over a complete discrete valuation ring O of characteristic zero to which the characterisation of Knörr lattices in terms of stable endomorphism rings in the case of finite group algebras can be extended. This class includes finite group algebras, their blocks and source algebras and Hopf orders. We also show that certain arithmetic properties of finite group representations extend to this class of algebras. Our results are based on an explicit description of Tate duality for lattices over symmetric O-algebras whose extension to the quotient field of O is separable.

Publication Type:	Article
Publisher Keywords:	symmetric algebras, Tate duality, Knörr lattices
Departments:	School of Science & Technology > Mathematics
SWORD Depositor:	Symplectic Administrator

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