City Research Online

Abstract

For two derived equivalent k-algebras λ̄ and γ̄, we introduce a correspondence between O-orders reducing to λ̄ and O-orders reducing to γ̄. We outline how this may be used to transfer properties like uniqueness (or non-existence) of a lift between λ̄ and γ̄. As an application, we look at tame algebras of dihedral type with two simple modules, where, most notably, we are able to show that among those algebras only the algebras Dκ,0(2A) and Dκ,0(2B) can actually occur as basic algebras of blocks of group rings of finite groups.

Publication Type:	Article
Additional Information:	© 2012, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords:	Orders; Integral representations; Derived equivalences; Dihedral defect
Subjects:	Q Science > QA Mathematics
Departments:	School of Science & Technology > Mathematics
SWORD Depositor:	Symplectic Administrator

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