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Pseudoautomorphisms of Bruck loops and their generalizations

Mark GreerMichael Kinyon — 2012

Commentationes Mathematicae Universitatis Carolinae

We show that in a weak commutative inverse property loop, such as a Bruck loop, if α is a right [left] pseudoautomorphism with companion c , then c [ c 2 ] must lie in the left nucleus. In particular, for any such loop with trivial left nucleus, every right pseudoautomorphism is an automorphism and if the squaring map is a permutation, then every left pseudoautomorphism is an automorphism as well. We also show that every pseudoautomorphism of a commutative inverse property loop is an automorphism, generalizing...

Moufang semidirect products of loops with groups and inverse property extensions

Mark GreerLee Raney — 2014

Commentationes Mathematicae Universitatis Carolinae

We investigate loops which can be written as the semidirect product of a loop and a group, and we provide a necessary and sufficient condition for such a loop to be Moufang. We also examine a class of loop extensions which arise as a result of a finite cyclic group acting as a group of semiautomorphisms on an inverse property loop. In particular, we consider closure properties of certain extensions similar to those as in [S. Gagola III, Cyclic extensions of Moufang loops induced by semiautomorphisms,...

Automorphic loops and metabelian groups

Mark GreerLee Raney — 2020

Commentationes Mathematicae Universitatis Carolinae

Given a uniquely 2-divisible group G , we study a commutative loop ( G , ) which arises as a result of a construction in “Engelsche elemente noetherscher gruppen” (1957) by R. Baer. We investigate some general properties and applications of “ ” and determine a necessary and sufficient condition on G in order for ( G , ) to be Moufang. In “A class of loops categorically isomorphic to Bruck loops of odd order” (2014) by M. Greer, it is conjectured that G is metabelian if and only if ( G , ) is an automorphic loop. We...

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