Results 81 to 90 of about 152,483 (296)
On the Van Est homomorphism for Lie groupoids [PDF]
L'Enseignement mathématique, 2014 The Van Est homomorphism for a Lie groupoid $G \rightrightarrows M$, as introduced by Weinstein-Xu, is a cochain map from the complex $C^\infty(BG)$ of groupoid cochains to the Chevalley-Eilenberg complex $C(A)$ of the Lie algebroid $A$ of $G$.
David Li-Bland, E. Meinrenken
semanticscholar +1 more source
Between 2- and 3-colorability [PDF]
, 2014 We consider the question of the existence of homomorphisms between $G_{n,p}$ and odd cycles when $p=c/n ...
Frieze, Alan, Pegden, Wesley
core +2 more sources
Gaps in full homomorphism order
, 2017 We characterise gaps in the full homomorphism order of graphs.Comment: 9 pages, extended abstract for Eurocomb ...
Fiala, Jiří +2 more
core +1 more source
Units in group rings and blocks of Klein four or dihedral defect
Bulletin of the London Mathematical Society, EarlyView.Abstract We obtain restrictions on units of even order in the integral group ring ZG$\mathbb {Z}G$ of a finite group G$G$ by studying their actions on the reductions modulo 4 of lattices over the 2‐adic group ring Z2G$\mathbb {Z}_2G$. This improves the “lattice method” which considers reductions modulo primes p$p$, but is of limited use for p=2$p=2 ...
Florian Eisele, Leo Margolis
wiley +1 more source
On generalized derivations as homomorphisms and anti-homomorphisms
Glasnik Matematicki, 2004 Summary: The concepts of derivations as well as generalized derivations (i.e. \(I_{a,b}(x)=ax+xb\), for all \(a,b\in R\)) have been generalized as an additive function \(F\colon R\to R\) satisfying \(F(xy)=F(x)y+xd(y)\) for all \(x,y\in R\), where \(d\) is a nonzero derivation on \(R\). Such a function \(F\) is said to be a generalized derivation.
openaire +4 more sources
Arithmetic sparsity in mixed Hodge settings
Bulletin of the London Mathematical Society, EarlyView.Abstract Let X$X$ be a smooth irreducible quasi‐projective algebraic variety over a number field K$K$. Suppose X$X$ is equipped with a p$p$‐adic étale local system compatible with an admissible graded‐polarized variation of mixed Hodge structures on the complex analytification of XC$X_{\operatorname{\mathbb {C}}}$.
Kenneth Chung Tak Chiu
wiley +1 more source
Hyers-Ulam-Rassias stability of Jordan homomorphisms on Banach algebras
Journal of Inequalities and Applications, 2005 We prove that a Jordan homomorphism from a Banach algebra into a semisimple commutative Banach algebra is a ring homomorphism. Using a signum effectively, we can give a simple proof of the Hyers-Ulam-Rassias stability of a Jordan homomorphism between ...
Hirasawa Go +2 more
doaj
Algorithms for determining the type of algebraic hyperstructures and morphisms [PDF]
Mathematics and Computational SciencesIn this paper, we present some primary methods to define a hypergroupoid by algorithm. Then, we present algorithms for checking if it is closed under ο, associativity, weak associativity, commutativity, weak commutativity, establishing the reproduction ...
Aboutorab Pourhaghani +2 more
doaj +1 more source
Subnormal closure of a homomorphism
, 2014 Let $\varphi\colon\Gamma\to G$ be a homomorphism of groups. In this paper we introduce the notion of a subnormal map (the inclusion of a subnormal subgroup into a group being a basic prototype). We then consider factorizations $\Gamma\xrightarrow{\psi} M\
Farjoun, Emmanuel D., Segev, Yoav
core +1 more source
Centrality of star and monotone factorisations
Bulletin of the London Mathematical Society, EarlyView.Abstract A factorisation problem in the symmetric group is central if conjugate permutations always have the same number of factorisations. We give the first fully combinatorial proof of the centrality of transitive star factorisations that is valid in all genera, which answers a natural question of Goulden and Jackson from 2009.
Jesse Campion Loth, Amarpreet Rattan
wiley +1 more source