Results 111 to 120 of about 1,200 (220)

Analyticity angle for non-commutative diffusion semigroups

, 2010
International audienceUnder certain hypotheses, diffusion semigroups on commutative $L^p$-spaces are known to have an analytic extension for $|\arg z| < \pi/2 −\arctan (|p−2| / 2 \sqrt{p−1})$. In this paper it is shown that semigroups on non-commutative $
Kriegler, Christoph
core  

The Lattice of Equational Classes of Commutative Semigroups

, 1971
There has been some interest lately in equational classes of commutative semigroups (see, for example, [2; 4; 7; 8]). The atoms of the lattice of equational classes of commutative semigroups have been known for some time [5].
Evelyn Nelson
core   +1 more source

Semigroup Commutators under Differences

Revista Matemática Iberoamericana, 1992
One considers on a domain \(\Omega\) in \(\mathbb{R}^ n\) a self-adjoint second order subelliptic operator with positive characteristic. It can be written \[ Lf= h^{-1} \sum_{i,j} \partial_ i a_{ij} \partial_ j\cdot hf \] with \(h\), \(h^{-1}\), \(a_{ij}\in C^ \infty\) and real, and with the matrix \((a_{ij})\) non-negative.
openaire   +2 more sources

Fuzzy bipolar soft semiprime ideals in ordered semigroups. [PDF]

Heliyon, 2021
Aziz-Ul-Hakim, Khan H, Ahmad I, Khan A.
europepmc   +1 more source

Computational Complexity of the Word Problem for Commutative Semigroups

, 1975
We analyze the computational complexity of some decision problems for commutative semigroups in terms of time and space on a Turing machine. The main result we present is that any decision procedure for the word problemm for commutative semigroups ...
Cardoza, Edward W.
core  

Curvature-Dimension Conditions for Symmetric Quantum Markov Semigroups. [PDF]

Ann Henri Poincare, 2023
Wirth M, Zhang H.
europepmc   +1 more source

Unification and equation solving in nilpotent groups and monoids [PDF]

, 1991
Unification and equation solving have been considered for groups [44], semigroups [43], abelian groups [39] and abelian semigroups [25], [33], [68], [69]. In this thesis we consider partially commutative groups and monoids. Nilpotency provides us with a
Burke, Edmund Kieran, Burke, E.K
core  

Semigroup models for biochemical reaction networks. [PDF]

J Math Biol, 2023
Loutchko D.
europepmc   +1 more source

New decision algorithms for finitely presented commutative semigroups

, 1981
A new solution of the uniform word problem for finitely presented commutative semigroups is constructed from a completion procedure for commutative-associative term rewriting systems.
Lankford, D.S., Ballantyne, A.M.
core   +1 more source

Graph-Theoretic Idealization of Semigroups via Bruck-Reilly Extensions

Mathematics
This paper establishes a graph-theoretic framework for idealization semigroups arising from Bruck–Reilly extensions. Building on a recent study by Wazzan and Ozalan, we introduce five graph families—ΓE, Γ0, ΓCay, ΓK, and Γ(Gk)—each encoding a distinct ...
Suha Wazzan, David A. Oluyori
doaj   +1 more source