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    Automorphisms of tiled orders 

    Haefner, Jeremy; Pappacena, Christopher (Elsevier, 2002)
    Let Λ be a tiled R-order. We give a description of AutR(Λ) as the semidirect product of Inn(Λ) and a certain subgroup of Aut(Q(Λ)), where Q(Λ) is the link graph of Λ. Additionally, we give criteria for determining when ...
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    Approximating rings with local units via automorphisms 

    Abrams, G.; Haefner, Jeremy; del Rio, A. (Springer Verlag, 1999-02)
    For a ring A with local units we investigate unital overrings T of A, and compare the automorphism groups Aut(A) and Aut(T ).
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    Actions of picard groups on graded rings 

    Haefner, Jeremy; Del Rio, Angel (Elsevier, 1999)
    No abstract found.
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    Graded equivalence theory with applications 

    Haefner, Jeremy (Elsevier, 1995-03-01)
    We develop the foundations for graded equivalence theory and apply them to investigate properties such as primeness, finite representation type, and vertex theory of graded rings. The key fact that we prove is that, for ...

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    AuthorHaefner, Jeremy (4)Abrams, G. (1)del Rio, A. (1)Del Rio, Angel (1)Pappacena, Christopher (1)Date Issued1999 (2)1995 (1)2002 (1)Has File(s)
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