Homomorphisms of unary algebras and of their expansions
Displaying 41 – 60 of 126
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 , of partial monounary algebras are investigated such that each interval in is also an interval in , and conversely.
Limit preserving full embeddings.
Trnková, V, Sichler, J. (2008)
Theory and Applications of Categories [electronic only]
Modular elements in congruence lattices of -sets.
Vernikov, Boris M. (2000)
Beiträge zur Algebra und Geometrie
Mono-unary algebras in the work of Czechoslovak mathematicians
Miroslav Novotný (1990)
Archivum Mathematicum
Monounary algebras with two direct limits
Emília Halušková (2000)
Mathematica Bohemica
In this paper we describe all algebras with one unary operation such that by a direct limit construction exactly two nonisomorphic algebras can be obtained from .
Morphisms of a certain class of monounary algebras
Jiří Novotný (1988)
Mathematica Slovaca
Note on compatible binary relations on algebras
Jan Chvalina (1981)
Archivum Mathematicum
On 2-homogeneity of monounary algebras
Danica Jakubíková-Studenovská (2003)
Czechoslovak Mathematical Journal
Fraïssé introduced the notion of a -set-homogeneous relational structure. In the present paper the following classes of monounary algebras are described: , , —the class of all algebras which are 2-set-homogeneous with respect to subalgebras, connected subalgebras, connected partial subalgebras, respectively, and , , —the class of all algebras which are 2-homogeneous with respect to subalgebras, connected subalgebras, connected partial subalgebras, respectively.
On a cancellation law for monounary algebras.
Jakubíková-Studenovská, Danica (2003)
Mathematica Bohemica
On a cancellation law for monounary algebras
Danica Jakubíková-Studenovská (2003)
Mathematica Bohemica
In this paper we investigate the validity of a cancellation law for some classes of monounary algebras.
On a relationship between monoids and monounary algebras
Miroslav Novotný (1984)
Časopis pro pěstování matematiky
On a representation of monounary algebras
Danica Jakubíková-Studenovská (2005)
Czechoslovak Mathematical Journal
In this note we deal with a question concerning monounary algebras which is analogous to an open problem for partially ordered sets proposed by Duffus and Rival.
On automorphism groups of relational systems and universal algebras
J. Płonka (1979)
Colloquium Mathematicae
On bounding congruences in some algebras having the lattice structure
J. Płonka (1982)
Banach Center Publications
On certain congruence lattices of finite unary algebras
Péter Pál Pálfy (1978)
Commentationes Mathematicae Universitatis Carolinae
On completions of partial monounary algebras
Danica Jakubíková-Studenovská (1988)
Czechoslovak Mathematical Journal
On congruence lattices of finite partial unary algebras
Danica Jakubíková-Studenovská (1981)
Commentationes Mathematicae Universitatis Carolinae
On congruence relations of monounary algebras. I
Danica Jakubíková-Studenovská (1982)
Czechoslovak Mathematical Journal
On congruence relations of monounary algebras. II
Danica Jakubíková-Studenovská (1983)
Czechoslovak Mathematical Journal