Results 21 to 30 of about 82 (72)

The homology of groupnets [PDF]

open access: yes, 2017
In this thesis I use the theory of groupnets (Brandt groupoids) to investigate the homology of mapping cylinder groupnets; that is, groupnets G which are the homotopy colimits of diagrams (V, A) of groupnets.
Horadam, Kathryn Jennifer
core   +2 more sources

The dual of z-submodules of modules and some of extensions

open access: yes, 2023
Let R be a commutative ring with identity and M be an R-module. The purpose of this paper is to introduced the dual notion of z-submodules of M and some of extensions.
Nazari, E.   +2 more
core  

The Clebsch--Gordan coefficients of $U(\mathfrak{sl}_2)$ and the Terwilliger algebras of Johnson graphs

open access: yes, 2023
The universal enveloping algebra $U(\mathfrak{sl}_2)$ of $\mathfrak{sl}_2$ is a unital associative algebra over $\mathbb C$ generated by $E,F,H$ subject to the relations \begin{align*} [H,E]=2E, \qquad [H,F]=-2F, \qquad [E,F]=H. \end{align*} The element $
Huang, Hau-Wen
core   +1 more source

COMODULES OVER WEAK MULTIPLIER BIALGEBRAS

open access: yes, 2014
This is a sequel paper of [2] in which we study the comodules over a reg- ular weak multiplier bialgebra over a field, with a full comultiplication. Replacing the usual notion of coassociative coaction over a (weak) bialgebra, a comodule is defined via a
Gabriella Böhm, Böhm, Gabriella Eszter
core   +1 more source

φ-weakly second submodules

open access: yes, 2022
Let R be a commutative ring with identity and M be an R-module. A non-zero submodule N of M is said to be a weakly second submodule if rsN⊆K, where r,s∈R and K is a submodule of M, implies either rN⊆K or sN⊆K.
TEKİR, ÜNSAL
core  

Produced representations of Lie algebras and Harish-Chandra modules

open access: yes, 1987
The comultiplication of the universal enveloping algebra of a Lie algebra is used to give modules produced from a subalgebra, an additional compatible structure of a module over an algebra of formal power series. When only the k \
Michael J. Heumos
core   +1 more source

Rational Cherednik algebras, quiver Schur algebras and cohomological Hall algebras [PDF]

open access: yes, 2019
This thesis is devoted to three interrelated problems in representation theory. The first problem concerns the combinatorial aspects of the connection between rational Cherednik algebras at $t=0$ and Hilbert schemes.
Przezdziecki, T. ; https://orcid.org/   +1 more
core   +1 more source

ON ENDOMORPHISMS OF MULTIPLICATION AND COMULTIPLICATION MODULES

open access: yes, 2014
. Let R be a ring with an identity (not necessarily commutative) and let M be a left R-module. This paper deals with multiplication and comultiplication left R-modules M having right EndR(M)-module structures ...
H. Ansari-toroghy, F. Farshadifar
core  

Coalgèbres d'Alexander-Whitney : un modèle algébrique pour les espaces topologiques [PDF]

open access: yes, 2009
The goal of this work is to study Alexander-Whitney coalgebras (first defined in [HPST06]) from a topological point of view. An Alexander-Whitney coalgebra is a coassociative chain coalgebra over Z with an extra algebraic structure : the comultiplication
Naïto, Théophile
core   +1 more source

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