Semidualizing modules of 2 × 2 Ladder determinantal rings
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DOI: 10.1016/j.jalgebra.2019.07.030
Abstract: Abstract We continue our study of ladder determinantal rings over a field k from the perspective of semidualizing modules. In particular, given a ladder of variables Y, we show that the associated ladder determinantal ring… read more here.
Keywords: semidualizing modules; determinantal rings; ladder determinantal; isomorphic semidualizing ... See more keywords
Highly arc-transitive digraphs with non-isomorphic local actions
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DOI: 10.1142/s0219498818500342
Abstract: This paper shows that, for any positive integer s, there exist s-arc-transitive digraphs which have non-isomorphic in-local action and out-local action. read more here.
Keywords: isomorphic local; non isomorphic; digraphs non; transitive digraphs ... See more keywords
Groups with finitely many non-isomorphic factor-groups
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DOI: 10.1142/s0219498821502236
Abstract: We prove that if [Formula: see text] is either a hypercentral-by-finite group or a soluble Baer group and if [Formula: see text] has finitely many non-isomorphic factor-groups, then [Formula: see text] is a Chernikov group.… read more here.
Keywords: non isomorphic; finitely many; isomorphic factor; many non ... See more keywords