Results 71 to 80 of about 406 (162)
Some properties of the growth and of the algebraic entropy of group endomorphisms [PDF]
, 2016 We study the growth of group endomorphisms, a generalization of the classical notion of growth of finitely generated groups, which is strictly related to algebraic entropy.
Spiga, Pablo, GIORDANO BRUNO, Anna
core +1 more source
The monoid of endomorphisms of disconnected hypergraphs
, 2013 We prove that the monoid of endomorphisms of an arbitrary disconnected hypergraph is isomorphic to a wreath product of a transformation semigroup with a certain small category.
Zhuchok, Yu.V.
core +2 more sources
Endomorphisms of Free Groups That Preserve Automorphic Orbits
Journal of Algebra, 2002 Using classical tools from combinatorial group theory, namely Nielsen transformations and the standard Whitehead graph, it is proved that if an endomorphism, \(\varphi\), of a free group of finite rank preserves a nontrivial automorphic orbit, then \(\varphi\) is actually an isomorphism, which confirms a conjecture of \textit{V. Shpilrain} [Arch.
openaire +1 more source
Mathematika, Volume 72, Issue 2, April 2026.Abstract In this paper, we study traces of Hecke operators on Drinfeld modular forms of level 1 in the case A=Fq[T]$A = \mathbb {F}_q[T]$. We deduce closed‐form expressions for traces of Hecke operators corresponding to primes of degree at most 2 and provide algorithms for primes of higher degree.
Sjoerd de Vries
wiley +1 more source
D.: Lifting endomorphisms to automorphisms
, 2008 . Normal endomorphisms of von Neumann algebras need not be extendable to automorphisms of a larger von Neumann algebra, but they always have asymptotic lifts.
William Arveson, Dennis Courtney
core
Automorphisms of the endomorphism algebra of a free module
Linear Algebra and its Applications, 2016 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Courtemanche, Jordan, Dugas, Manfred
openaire +1 more source
Extensible endomorphisms of compact groups
, 2023 We show that the endomorphisms of a compact connected group that extend to endomorphisms of every compact overgroup are precisely the trivial one and the inner automorphisms; this is an analogue, for compact connected groups, of results due to Schupp and
Chirvasitu, Alexandru
core
Endomorphism and automorphism structure of direct squares of universal algebras [PDF]
Pacific Journal of Mathematics, 1975 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +3 more sources
Endomorphisms and automorphisms from subfactors illustrating non-commutative entropy
, 2005 We present a series of examples of endomorphisms and automorphisms arising from subfactors, which illustrate some of the recent theorems in non-commutative entropy theory.
Svendsen, Anne Louise
core
Entropy for endomorphisms of LCA groups
, 2012 We introduce a modified version of the entropy defined for locally compact Abelian groups by Peters. This approach allows us to work with endomorphisms instead of working with automorphisms.
Virili, Simone
core +1 more source