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Infinite algebras with 3-transitive groups of weak automorphisms

László Szabó (2001)

Archivum Mathematicum

The infinite algebras with 3-transitive groups of weak automorphisms are investigated. Among others it is shown that if an infinite algebra with 3-transitive group of weak automorphisms has a nontrivial idempotent polynomial operation then either it is locally functionally complete or it is polynomially equivalent to a vector space over the two element field or it is a simple algebra that is semi-affine with respect to an elementary 2-group. In the second and third cases the group of weak automorphisms...

Intervals in partial monounary algebras

Danica Jakubíková-Studenovská (1991)

Mathematica Bohemica

In this paper the notion of an interval in a partial monounary algebra is introduced and pairs ( A , f ) , ( A , g ) of partial monounary algebras are investigated such that each interval in ( A , f ) is also an interval in ( A , g ) , and conversely.

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