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Ring extensions and endomorphism rings of a module [PDF]

open access: bronze, 1993
Kazuhiko Hirata, Yasukazu Yamashiro
openalex   +1 more source

On P-coherent endomorphism rings

open access: yesProceedings Mathematical Sciences, 2008
Let \(M_R\) be a right \(R\)-module and \(S\) the endomorphism ring of \(M_R\). The \(P\)-coherence of ring \(S\) is studied (i.e. when every principal right ideal of \(S\) is finitely presented). The following conditions are equivalent: (1) \(S\) is a right \(P\)-coherent ring; (2) Every cyclically \(M\)-copresented right \(R\)-module has an \(\text ...
openaire   +2 more sources

Computing endomorphism rings of abelian varieties of dimension two [PDF]

open access: yes, 2012
Generalizing amethod of Sutherland and the author for elliptic curves [5, 1] we design a subexponential algorithm for computing the endomorphism rings of ordinary abelian varieties of dimension two over finite fields.
Gaetan Bisson
core  

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