Weak automorphisms of 1-unary algebras
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Libor Polák (1982)
Banach Center Publications
K. Głazek (1970)
Colloquium Mathematicae
J. Dudek, E. Płonka (1971)
Colloquium Mathematicae
Ivan Chajda (1991)
Czechoslovak Mathematical Journal
Chajda, Ivan, Šešelja, Branimir, Tepavčević, Andreja (2002)
Novi Sad Journal of Mathematics
Andrzej Walendziak (2002)
Czechoslovak Mathematical Journal
Here we consider the weak congruence lattice of an algebra with the congruence extension property (the CEP for short) and the weak congruence intersection property (briefly the WCIP). In the first section we give necessary and sufficient conditions for the semimodularity of that lattice. In the second part we characterize algebras whose weak congruences form complemented lattices.
Ivan Chajda (1990)
Časopis pro pěstování matematiky
K. Głazek, T. Katriňák (1982)
Banach Center Publications
Ivan Chajda (1977)
Archivum Mathematicum
Ján Jakubík (1980)
Czechoslovak Mathematical Journal
I. Sain (1982)
Diagrammes
Wiktor Bartol (1990)
Commentationes Mathematicae Universitatis Carolinae
Wiktor Bartol (1990)
Commentationes Mathematicae Universitatis Carolinae
Ivan Chajda (1986)
Czechoslovak Mathematical Journal
J. VanderWerf (1996)
Semigroup forum
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