Results 211 to 220 of about 12,693 (255)

Quantum phases in twisted homobilayer transition metal dichalcogenides. [PDF]

Natl Sci Rev
Li B, Qiu WX, Wu F, MacDonald AH.
europepmc   +1 more source

Bridging Fragmentation in Digital Transformation Research: Building an Interface Between Operations Management and Information Systems

Journal of Operations Management, EarlyView.
Sunil Tiwari, Ashish Kumar Jha, Jan C. Fransoo, Jason Bennett Thatcher, Karthik Ramachandran, Jan Recker, Gregory R. Heim, Merieke Stevens   +7 more
wiley   +1 more source

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Locally finite varieties

Algebra Universalis, 2001
The following criterion for a variety \(\mathcal V\) is proved: \(\mathcal V\) is locally finite iff \(\mathcal V\) is generated by a regular locally finite class iff the class \(\mathcal V_{SI}\) is regularly locally finite in the weak sense. If \(\mathcal V\) has a finite signature then \(\mathcal V\) is locally finite iff \(\mathcal V\) is generated
Guram Bezhanishvili, Bezhanishvili Guram   +1 more
exaly   +3 more sources

On Locally Finite Modular Lattice Varieties of Finite Height

Order, 2007
The main result of the paper is the following theorem: For any natural number \(n\) there are only finitely many varieties which are of height \(\leq n\) in the lattice of varieties and generated by modular lattices of finite height. Each such variety is generated by a finite lattice.
Herrmann Christian
exaly   +2 more sources

The Variety Generated by Finite Locally Trivial Monoids

Southeast Asian Bulletin of Mathematics, 2001
The objective of the paper is to describe the (pseudo)varieties of (left, right, or bilateral) locally trivial monoids. The authors use very elementary techniques, but fail to prove more than the known results, namely those of \textit{H. Straubing} [Semigroup Forum 24, 25-38 (1982; Zbl 0503.20024)] and the reviewer [Semigroups, theory and applications,
Weijia Jia, Jia Weijia
exaly   +3 more sources

Locally finite varieties of Heyting algebras

Algebra Universalis, 2005
We show that for a variety $$ \mathcal{V} $$ of Heyting algebras the following conditions are equivalent: (1) $$ \mathcal{V} $$ is locally finite; (2) the
Guram Bezhanishvili, Revaz Grigolia, Bezhanishvili Guram   +2 more
exaly   +2 more sources

Finite posets and topological spaces in locally finite varieties

Algebra Universalis, 2005
It is proved that if a finite connected poset admits an order-preserving Taylor operation, then it has all homotopy groups trivial. This is deduced from the result of \textit{W. Taylor} [Can. J. Math. 29, 498--527 (1977; Zbl 0357.08004)] saying that such a poset has an abelian fundamental group.
Benoit Larose, László Zadori, Larose Benoit   +2 more
exaly   +2 more sources

Positive universal classes in locally finite varieties

Algebra Universalis, 2010
Consider a fixed type of algebras. A Q-independent sequence of algebras is a sequence\break \(A_1,A_2,A_3,\dots\) of algebras such that, for arbitrary \(i\neq j\), \(A_i\) is not a homomorphic image of a subalgebra of \(A_j\). It is proved that locally finite varieties having a Q-independent sequence have continuum many subclasses defined by ...
G Gratzer, Gratzer G
exaly   +2 more sources

Type Preservation In Locally Finite Varieties with the CEP

Canadian Journal of Mathematics, 1991
AbstractAssume that A is a finite algebra contained in a variety that has the congruence extension property and that B is a subalgebra of A. If α ≺ β in Con A and α |B ≠ β |B, then we show that α |B ≺ β |B and that there is a close connection between the type labellings of the quotients 〈α, α〉 and 〈α|B, β|B〉.
Keith A. Kearnes
openaire   +3 more sources