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Currently displaying 1 – 4 of 4

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Weak subalgebra lattices of monounary partial algebras

Wiktor Bartol — 1990

Commentationes Mathematicae Universitatis Carolinae

Weak subalgebra lattices

Wiktor Bartol — 1990

Commentationes Mathematicae Universitatis Carolinae

The weak hereditary class of a variety

Wiktor Bartol; Francesc Rosselló — 2006

Czechoslovak Mathematical Journal

We study the weak hereditary class $S_{w} (𝒦)$ of all weak subalgebras of algebras in a total variety $𝒦$ . We establish an algebraic characterization, in the sense of Birkhoff’s HSP theorem, and a syntactical characterization of these classes. We also consider the problem of when such a weak hereditary class is weak equational.

Helena Rasiowa, 1917-1994

Wiktor Bartol; Ewa Orłowska; Andrzej Skowron — 1999

Banach Center Publications

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