Results 61 to 70 of about 4,589 (218)

A Rickart-Like Theorem for the Additivity of Multiplicative Maps on Rings

Journal of Mathematics, 2022
Rickart’s theorem states that every bijective multiplicative mapping of a Boolean ring R onto an arbitrary ring S is necessarily additive. We prove a version of Rickart’s theorem for non-bijective mappings.
Bana Al Subaiei, Noômen Jarboui
doaj   +1 more source

Isometric immersions into three‐dimensional unimodular metric Lie groups

Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.
Abstract We study isometric immersions of surfaces into simply connected three‐dimensional unimodular Lie groups endowed with either Riemannian or Lorentzian left‐invariant metrics, assuming that Milnor's operator is diagonalizable in the Lorentzian case.
Ildefonso Castro, José M. Manzano, José S. Santiago   +2 more
wiley   +1 more source

Computing supersingular endomorphism rings using inseparable endomorphisms

Journal of Algebra
We give an algorithm for computing an inseparable endomorphism of a supersingular elliptic curve $E$ defined over $\mathbb F_{p^2}$, which, conditional on GRH, runs in expected $O(p^{1/2}(\log p)^2(\log\log p)^3)$ bit operations and requires $O((\log p)^2)$ storage.
Fuselier, Jenny, Iezzi, Annamaria, Kozek, Mark, Morrison, Travis, Namoijam, Changningphaabi   +4 more
openaire   +6 more sources

Ranks of Monoids of Endomorphisms of a Finite Undirected Path [PDF]

, 2020
In this paper, we study the widely considered endomorphisms and weak endomorphisms of a finite undirected path from monoid generators perspective. Our main aim is to determine the ranks of the monoids wEnd Pn and End Pn of all weak endomorphisms and all ...
Quinteiro, T. M., Koppitz, J., Fernandes, V. H., Dimitrova, I.   +3 more
core   +1 more source

h$h$‐Function, Hilbert–Kunz density function and Frobenius–Poincaré function

Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.
Abstract Given ideals I,J$I,J$ of a noetherian local ring (R,m)$(R, \mathfrak {m})$ such that I+J$I+J$ is m$\mathfrak {m}$‐primary and a finitely generated R$R$‐module M$M$, we associate an invariant of (M,R,I,J)$(M,R,I,J)$ called the h$h$‐function.
Cheng Meng, Alapan Mukhopadhyay
wiley   +1 more source

On the ring of inertial endomorphisms of an abelian p-group [PDF]

, 2012
An endomorphisms $\varphi$ of a group $G$ is said inertial if $\forall H\le G$ \ \ $|\varphi(H):(H\cap \varphi(H))|
RINAURO, Silvana, U. Dardano, DARDANO, ULDERICO, RINAURO S.   +3 more
core  

Approximate innerness and central triviality of endomorphisms [PDF]

, 2009
We introduce the notions of approximate innerness and central triviality for endomorphisms on separable von Neumann factors, and we characterize them for hyperfinite factors by Connes–Takesaki modules of endomorphisms and modular endomorphisms which are ...
Tomatsu, Reiji, Masuda, Toshihiko
core   +1 more source

On the integral simplicial volume of cyclic covers of mapping tori

Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.
Abstract In this paper, we investigate the asymptotic behavior of the integral simplicial volume of cyclic covers of manifolds that fiber over the circle with fiber given by an n$n$‐dimensional torus. By studying the integral filling volume—an invariant introduced by Frigerio and the first author—for the monodromy, we establish both lower and upper ...
Federica Bertolotti, Ervin Hadžiosmanović   +1 more
wiley   +1 more source

Large deviations for endomorphisms of torus

Lietuvos Matematikos Rinkinys, 2004
There is not abstract.
Birutė Kryžienė, Gintautas Misevičius   +1 more
doaj   +3 more sources

Dynamics of Endomorphism of Finite Abelian Groups

Discrete Dynamics in Nature and Society, 2017
We study the dynamics of endomorphisms on a finite abelian group. We obtain the automorphism group for these dynamical systems. We also give criteria and algorithms to determine whether it is a fixed point system.
Zhao Jinxing, Nan Jizhu
doaj   +1 more source