Results 141 to 150 of about 12,499 (158)

Automorphisms and endomorphisms of lacunary hyperbolic groups

2016
In this article we study automorphisms and endomorphisms of lacunary hyperbolic groups. We prove that every lacunary hyperbolic group is Hopfian, answering a question by Henry Wilton. In addition, we show that if a lacunary hyperbolic group has the fix point property for actions on $\mathbf R$-trees, then it is co-Hopfian and its outer automorphism ...
Coulon, R��mi, Guirardel, Vincent
openaire   +1 more source

Endomorphisms of Linear Block Codes

International Symposium on Information Theory
The automorphism groups of various linear codes are extensively studied yielding insights into the respective code structure. This knowledge is used in, e.g., theoretical analysis and in improving decoding performance, motivating the analyses of ...
Jonathan Mandelbaum, Sisi Miao, Holger Jaekel, Laurent Schmalen   +3 more
semanticscholar   +1 more source

Wold’s Theorem and Automorphic Factors of Endomorphisms

2018
In this chapter, we discuss Wold’s theorem stating the existence of a decomposition of any isometry operator of a Hilbert space in a unitary part and a unilateral shift.
Sergey Bezuglyi, Palle E. T. Jorgensen
openaire   +1 more source

Endomorphisms of precyclic n-groups

Quasigroups And Related Systems
We characterize the sets of homomorphisms, endomorphisms and automorphisms of n-ary groups with cyclic retracts.
Sonia Dog, N. Shchuchkin
semanticscholar   +1 more source

Automorphism Groups and Endomorphism Semigroups of Groups B(m, n)

Algebra and Logic, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Endomorphisms and Automorphisms for Factor Inclusions

1993
We investigate some kinds of *;-endomorphisms and automorphisms for inclusions of type II1 factors in connection with Jones index theory.
openaire   +1 more source

Modules that are Invariant with Respect to Automorphisms and Idempotent Endomorphisms of Their Hulls and Covers

Journal of Mathematical Sciences, 2021
A. Abyzov, T. Quynh, A. Tuganbaev
semanticscholar   +1 more source

Formal Proof of Equivalence in Endomorphisms and Automorphisms over Strongly Connected Automata

2008 International Conference on Computer Science and Software Engineering, 2008
Automata theory has played an important role in modeling behavior of systems since last couple of decades. The algebraic automaton has emerged with several modern applications because of having properties and structures from algebraic theory. Design of a complex system not only requires behavior but it also needs to model its functionality.
Nazir Ahmad Zafar, Ajmal Hussain, Amir Ali   +2 more
openaire   +1 more source

The endomorphism monoids and automorphism groups of Cayley graphs of semigroups

Semigroup Forum, 2017
The main result is the following: Let \(S\) be a monoid and \(C\) be a generating set of \(S\). Then the quotient group \(\mathrm{CPAut}_C(S)/\mathrm{ColAut}_C(S)\) is isomorphic to \(\Aut(S,C)\). Here, a graph endomorphism \(\varphi\) of \(\mathrm{Cay}(S,C)\), is called a color-permutable endomorphism of \(\mathrm{Cay}(S,C)\), if there exists \(\gamma\
openaire   +1 more source

Automorphisms of the Bernoulli endomorphism and a class of skew-products

Ergodic Theory and Dynamical Systems, 1996
AbstractWe consider a class of skew-products with base the one-sided two-shift equipped with the (½, ½)Bernoulli measure and fibre either or the circle. We give conditions for the first kind to be isomorphic to the base itself and use this result to establish an isomorphism with the base for the second kind when a certain irrationalis very well ...
openaire   +2 more sources