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On a Generalization of the Notion of Semidirect Product of Groups
Generalization Notion of Semidirect Product of Groups
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2011/1/19
We introduce an external version of the internal r-fold semidirect product of groups (SDP) of [CC91]. Just as for the classical external SDP, certain algebraic data are required to guarantee associati...
If a prime divides a product
prime product
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2011/2/28
One of the greatest difficulties encountered by all in their first proof intensive class is
subtly assuming an unproven fact in a proof. The purpose of this note is to describe a specific instance wh...