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math.RA2013★ 7 cited
Commutator Theory and Abelian Algebras
Peter Ouwehand
This is the first draft of a set of lecture notes developed for one-half of a seminar on two approaches to the notion of "Abelian", namely those of universal algebra, and of catego…
math.RA2011
Absolute Retracts and Essential Extensions in Congruence Modular Varieties
Peter Ouwehand
This paper studies absolute retracts in congruence modular varieties of universal algebras. It is shown that every absolute retract with finite dimensional congruence lattice is a…