Results 31 to 40 of about 12,499 (158)

On endomorphism and automorphisms of some torsion-free modules [PDF]

, 2019
The relationship between the endomorphism ring and the automorphism group of an abelian p-group has been extensively investigated. It is known that theautomorphism group need not generate the full endomorphism ring. In this paper we investigate the analagous problem for torsion free modules over a complete discrete valuation ring obtaining similar ...
Brendan Goldsmith
openalex   +4 more sources

On algebraic endomorphisms of the Einstein gyrogroup [PDF]

, 2015
We describe the structure of all continuous algebraic endomorphisms of the open unit ball $\mathbf{B}$ of $\mathbb{R}^3$ equipped with the Einstein velocity addition.
Abe T., Dániel Virosztek, Einstein A., Lajos Molnár, Molnár L., Ungar A. A.   +5 more
core   +2 more sources

On Groups in Which Many Automorphisms Are Cyclic

Mathematics, 2022
Let G be a group. An automorphism α of G is said to be a cyclic automorphism if the subgroup ⟨x,xα⟩ is cyclic for every element x of G. In [F. de Giovanni, M.L. Newell, A. Russo: On a class of normal endomorphisms of groups, J.
Mattia Brescia, A. Russo
semanticscholar   +1 more source

A look at the inner structure of the 2-adic ring C*-algebra and its automorphism groups [PDF]

, 2017
We undertake a systematic study of the so-called 2-adic ring C\u87-algebra Q2. This is the universal C\u87-algebra generated by a unitary U and an isometry S2 such that S2U = U2S2 and S2S\u87 2+US2S\u87 2U\u87 = 1.
Aiello, Valeriano, Conti, Roberto, Rossi, Stefano   +2 more
core   +2 more sources

The Largest Subsemilattices of the Endomorphism Monoid of an Independence Algebra [PDF]

, 2014
An algebra $\A$ is said to be an independence algebra if it is a matroid algebra and every map $\al:X\to A$, defined on a basis $X$ of $\A$, can be extended to an endomorphism of $\A$.
Araújo, João, Bentz, Wolfram, Konieczny, Janusz   +2 more
core   +2 more sources

Endomorphisms of a variety of ueno type and kawaguchi-silverman conjecture [PDF]

International Journal of Mathematics
We first show that the moniod of separable surjective self morphisms of a variety of Ueno type coincides with the group of automorphisms. We also give an explicit description of the automorphism group.
K. Oguiso
semanticscholar   +1 more source

Automorphisms of the UHF algebra that do not extend to the Cuntz algebra

, 2010
Automorphisms of the canonical core UHF-subalgebra F_n of the Cuntz algebra O_n do not necessarily extend to automorphisms of O_n. Simple examples are discussed within the family of infinite tensor products of (inner) automorphisms of the matrix algebras
Cuntz, Evans, Power, ROBERTO CONTI
core   +1 more source

Fixed subgroups are compressed in surface groups [PDF]

, 2015
For a compact surface $\Sigma$ (orientable or not, and with boundary or not) we show that the fixed subgroup, $\operatorname{Fix} B$, of any family $B$ of endomorphisms of $\pi_1(\Sigma)$ is compressed in $\pi_1(\Sigma)$ i.e., $\operatorname{rk ...
Enric Ventura, Farb B., Friedman J., Jianchun Wu, Neumann H., Neumann H., Qiang Zhang   +6 more
core   +3 more sources

The action of outer automorphisms on bundles of chiral blocks [PDF]

, 1998
On the bundles of WZW chiral blocks over the moduli space of a punctured rational curve we construct isomorphisms that implement the action of outer automorphisms of the underlying affine Lie algebra.
Fuchs, J., Schweigert, C.
core   +5 more sources

Endomorphisms of the Cuntz Algebras

, 2011
This mainly expository article is devoted to recent advances in the study of dynamical aspects of the Cuntz algebras O_n, with n finite, via their automorphisms and, more generally, endomorphisms.
Conti, Roberto, Hong, Jeong Hee, Szymanski, Wojciech   +2 more
core   +1 more source