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08-XX General algebraic systems

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Displaying 401 – 420 of 2109

Definability in the lattice of equational theories of semigroups.

J. Jezek, R. McKenzie (1993)

Semigroup forum

Definability of principal congruences in equivalential algebras

PaweŁ Idziak, Andrzej Wroński (1998)

Colloquium Mathematicae

Demi-groupes, espaces affines et categories gauches

André Batbedat (1977)

Fundamenta Mathematicae

Demi-Semi-Primal Algebras and Mal'cev- Type Conditions.

Robert W. Quackenbusch (1971)

Mathematische Zeitschrift

Der Defkt endlicher abelscher Gruppen.

H.K. Kaiser (1974)

Monatshefte für Mathematik

Diamond identities for relative congruences

Gábor Czédli (1995)

Archivum Mathematicum

For a class $K$ of structures and $A \in K$ let ${C o n}^{*} (A)$ resp. ${C o n}^{K} (A)$ denote the lattices of $*$ -congruences resp. $K$ -congruences of $A$ , cf. Weaver [25]. Let ${C o n}^{*} (K) : = I {{C o n}^{*} (A) : A \in K}$ where $I$ is the operator of forming isomorphic copies, and ${C o n}^{r} (K) : = I {{C o n}^{K} (A) : A \in K}$ . For an ordered algebra $A$ the lattice of order congruences of $A$ is denoted by ${C o n}^{<} (A)$ , and let ${C o n}^{<} (K) : = I {{C o n}^{<} (A) : A \in K}$ if $K$ is a class of ordered algebras. The operators of forming subdirect squares and direct products are denoted by $Q^{s}$ and $P$ , respectively. Let $λ$ be a lattice identity and let $Σ$ be a set of lattice identities. Let $Σ ⊧_{c} λ (r; Q^{s}, P)$ denote...

Diassociativity is not finitely based relative to power associativity

Tomasz Kowalski (2010)

Commentationes Mathematicae Universitatis Carolinae

We show that the variety of diassociative loops is not finitely based even relative to power associative loops with inverse property.

Die Darstellung von partiellen $K$ -stelligen Operationen

Jan Kastl, Tomáš Tichý (1976)

Commentationes Mathematicae Universitatis Carolinae

Die Einbettung von Mittelwertstrukturen in Q-Vektorräume.

Werner Bos (1972)

Mathematische Zeitschrift

Die subdirekte Unzerlegbarkeit der Intervallrechnung.

H. Ratschek (1978)

Journal für die reine und angewandte Mathematik

Die Verbände mit nichteinfacher Funktionenalgebra.

Günther Karigl (1977)

Monatshefte für Mathematik

Different levels of word problems for some varieties.

Crvenković, S., Delić, D. (1996)

Novi Sad Journal of Mathematics

Dimension theory for cyclically and cocyclically ordered sets

Vítězslav Novák, Miroslav Novotný (1983)

Czechoslovak Mathematical Journal

Direct decomposability of congruences in congruence-permutable varieties

Ivan Chajda (1982)

Mathematica Slovaca

Direct decomposability of tolerances and congruences on semigroups

Bedřich Pondělíček (1988)

Czechoslovak Mathematical Journal

Direct decomposability of tolerances on lattices, semilattices and quasilattices

Ivan Chajda, Juhani Nieminen (1982)

Czechoslovak Mathematical Journal

Direct limits of congruence systems

Manfred Armbrust (1973)

Colloquium Mathematicae

Direct limits of monounary algebras

Emília Halušková (1999)

Czechoslovak Mathematical Journal

Direct products of homomorphic mappings. I

Ivan Chajda (1973)

Archivum Mathematicum

Direct products of homomorphic mappings. II

Ivan Chajda (1974)

Archivum Mathematicum

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