Results 81 to 90 of about 13,469,908 (217)

The Third Homomorphism Theorem

, 1995
The Third Homomorphism Theorem is a folk theorem of the constructive algorithmics community. It states that a function on lists that can be computed both from left to right and from right to left is necessarily a list homomorphism – it can be computed ...
Gibbons, J
core   +1 more source

A Common External Framework for Kleene and McCarthy Algebras

Mathematical Logic Quarterly, Volume 72, Issue 4, November 2026.
ABSTRACT Algebras of disjoint alternatives (ADAs), introduced by Manes, are extensions of McCarthy algebras by a unary operator acting as an oracle for the halting problem, and provide a semantics for the equational theory of the if–then–else construct.
Gandolfo Vergottini, Antonio Ledda, Pierluigi Graziani   +2 more
wiley   +1 more source

Global dimension of dg algebras via compact silting objects

Bulletin of the London Mathematical Society, Volume 58, Issue 10, October 2026.
Abstract We introduce a notion of global dimension for a triangulated category relative to a compact silting object. We prove that the finiteness of this dimension is an intrinsic property of the triangulated category itself and, therefore, independent of the choice of the silting object.
Panagiotis Kostas
wiley   +1 more source

Notes on a homomorphism from the affine Yangian associated with $\widehat{\mathfrak{sl}}(n)$ to the affine Yangian associated with $\widehat{\mathfrak{sl}}(n+1)$ [PDF]

In the previous paper, we constructed a homomorphism from the affine Yangian associated with $\widehat{\mathfrak{sl}}(n)$ to the standard degreewise completion of the affine Yangian associated with $\widehat{\mathfrak{sl}}(n+1)$.
Ueda, Mamoru
core   +1 more source

$R$-CONVEX SUBSETS OF BIMODULES OVER $*$-RINGS [PDF]

Journal of Algebraic Systems
Let $M$ and $N$ be bimodules over the unital $*$-rings $R$ and $B$, respectively.We investigate the notion of $R$-convexity and the corresponding notion of $R$-extreme points.We discuss the effect of an $f$-homomorphism on$R$-convex subsets and its ...
Ismail Nikoufar, Ali Ebrahimi Meymand
doaj   +1 more source

Mixed motives and linear forms in the Catalan constant

Journal of the London Mathematical Society, Volume 114, Issue 4, October 2026.
Abstract We first give a geometric construction of a two‐dimensional mixed motive over Q${\mathbb {Q}}$ with the Catalan constant G=1−1/32+1/52−1/72+⋯${\mathbf {G}}=1-1/3^2+1/5^2-1/7^2+\cdots$ as a period. We then use this motive to obtain a supply of linear forms in 1 and G${\mathbf {G}}$.
Payman Eskandari, V. Kumar Murty, Yusuke Nemoto   +2 more
wiley   +1 more source

The Homomorphism Poset of K_{2,n} [PDF]

, 2012
oai:arXiv.org:1008.1736A geometric graph is a simple graph G together with a straight line drawing of G in the plane with the vertices in general position.
Cockburn, Sally, Song, Yonghyun
core   +1 more source

On the mapping xy→(xy)n in an associative ring

International Journal of Mathematics and Mathematical Sciences, 2004
We consider the following condition (*) on an associative ring R:(*). There exists a function f from R into R such that f is a group homomorphism of (R,+), f is injective on R2, and f(xy)=(xy)n(x,y) for some positive integer n(x,y)>1. Commutativity and
Scott J. Beslin, Awad Iskander
doaj   +1 more source

Abelian number fields with frobenian conditions

Mathematika, Volume 72, Issue 4, October 2026.
Abstract We study the distribution of abelian number fields with frobenian conditions imposed on the conductor. In particular, we find an asymptotic for the number of abelian field extensions of a number field k$k$ whose conductor is the sum of two squares. We also discuss an application of the Brauer group of stacks to quadratic number fields.
Julie Tavernier
wiley   +1 more source

ON n-ARY HYPERGROUPS AND FUZZY n-ARY HOMOMORPHISM

, 2011
The aim of this paper is to introduce the notion of fuzzy homomorphism and fuzzy isomorphism between two n-ary hypergroups and to extend the fuzzy results of fundamental equivalence relations to n-ary hypergroups.
YAMAK, SULTAN, KAZANCI, OSMAN, Davvaz, B.   +2 more
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