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Epimorphisms from 2-bridge link groups onto Heckoid groups (II)
Epimorphisms 2-bridge link groups Group Theory
2012/6/18
We describe all upper-meridian-pair-preserving epimorphisms from 2-bridge link groups onto even Heckoid groups.
Singular equivalences induced by homological epimorphisms
singularity category triangle equivalence homological epimorphism non-Gorenstein algebra
2011/9/23
Abstract: We prove that a certain homological epimorphism between two algebras induces a triangle equivalence between their singularity categories. Applying the result to a construction of matrix alge...
On epimorphisms of spherical Moufang buildings
spherical Moufang buildings epimorphisms Combinatorics
2011/9/16
Abstract: In this paper we classify the the epimorphisms of irreducible spherical Moufang buildings (of rank at least 2) defined over a field. As an application we characterize indecomposable epimorph...