Results 51 to 60 of about 153 (86)

A quasivariety lattice of torsion-free soluble groups

Algebra and Logic, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

A Lattice of Quasivarieties of Normal Cryptogroups

Semigroup Forum, 2007
A normal cryptogroup S is a completely regular semigroup in which ${\cal H}$ is a congruence and $S/{{\cal H}}$ is a normal band.
openaire   +1 more source

Quasivarieties and Varieties of Lattice-Ordered Groups

1996
Many properties and statements of the theory of lattice-ordered groups (l-groups) can be formulated and proved in terms of first order logic. Special mention should be made of properties expressed by universal sentences such as identities and implications, which can be referred to as the theory of varieties and quasivarieties, respectively, of l-groups.
V. M. Kopytov, N. Ya. Medvedev
openaire   +1 more source

Lattices of dominions in quasivarieties of Abelian groups

Algebra and Logic, 2005
Summary: Let \(\mathcal M\) be any quasivariety of Abelian groups, \(\text{dom}_G^{\mathcal M}(H)\) be the dominion of a subgroup \(H\) of a group \(G\) in \(\mathcal M\), and \(L_q(\mathcal M)\) be the lattice of subquasivarieties of \(\mathcal M\).
openaire   +2 more sources

The lattice of quasivarieties of lattices

Algebra Universalis, 1979
Grätzer, G., Lakser, H.
openaire   +1 more source

Filters in the lattice of quasivarieties of metabelian groups

Siberian Mathematical Journal, 1998
The author gives a negative answer to a question posed by \textit{A. I. Budkin}: Is every nontrivial filter in the lattice of quasivarieties of torsion-free metabelian groups countable [The Kourovka notebook. Unsolved problems in group theory, 13th ed., Institute of Mathematics, Novosibirsk (1995; Zbl 0838.20001)].
openaire   +2 more sources

Embedding a free lattice in a lattice of quasivarieties of distributive lattices with pseudocomplementation

Algebra and Logic, 1983
Let \(B_ 3\) be the distributive lattice with pseudocomplementation obtained from the 3-atomic Boolean lattice by adding a new unit element, \({\mathcal B}_ 3\) the variety generated by \(B_ 3\), and \(L_ q({\mathcal B}_ 3)\) the lattice of sub-quasivarieties of \({\mathcal B}_ 3\). The author proves that the lattice \(L_ q({\mathcal B}_ 3)\) satisfies
openaire   +1 more source

Integrative oncology: Addressing the global challenges of cancer prevention and treatment

Ca-A Cancer Journal for Clinicians, 2022
Jun J Mao,, Msce, Lorenzo Cohen, Karen M Mustian   +2 more
exaly  

Distributivity conditions for lattices of dominions in quasivarieties of Abelian groups

, 2006
S. A. Shakhova
openalex   +1 more source

On Covers in the Lattice of Quasivarieties of l-Groups

, 1993
N. Ya. Medvedev
openalex   +1 more source