Results 81 to 90 of about 3,653,792 (195)

Generalized Derivations of BF-Algebras

open access: yesAcademic Science Journal
In this paper, we introduced the concept of generalized derivations of an algebraic structure namely BF-algebras and studied some of its basic properties.
Mohammed Khalid Shahoodh
doaj   +1 more source

The K-theory ranks for crossed products of C*-algebras by the group of integers

open access: yesCubo, 2019
We study the K-theory ranks for crossed products of C∗-algebras by the group of integers. As an application, we obtain certain estimates for the K-theory ranks of the group C∗-algebras of torsion free, finitely generated, nilpotent or solvable discrete ...
Takahiro Sudo
doaj   +1 more source

On the number of pentagons in triangle-free graphs [PDF]

open access: yes, 2013
Using the formalism of flag algebras, we prove that every triangle-free graph G with n vertices contains at most (n/5)(5) cycles of length five. Moreover, the equality is attained only when n is divisible by five and G is the balanced blow-up of the ...
Hatami, Hamed   +4 more
core   +1 more source

Modeling of Complex Systems by Means of Partial Algebras

open access: yesMendel, 2019
Complex systems are very hard to describe by some unified language and calculus. In cases when their nature is very heterogeneous is possible to use with advantage state description.
Jiri Bila   +2 more
doaj   +1 more source

Hall algebras and quantum groups [PDF]

open access: yes, 1990
Ringel CM. Hall algebras and quantum groups. Inventiones mathematicae.
Ringel, Claus Michael
core   +1 more source

On free completely iterative algebras

open access: yesCoRR, 2019
For every finitary set functor F we demonstrate that free algebras carry a canonical partial order. In case F is bicontinuous, we prove that the cpo obtained as the conservative completion of the free algebra is the free completely iterative algebra.
openaire   +7 more sources

No-cycle algebras and representation theory [PDF]

open access: yes
In the first half of this dissertation we study certain quotient algebras of preprojective algebras called no-cycle algebras N. These are studied via one-cycle algebras, which are introduced here.
Boddington, Paul
core  

Noncommutative symmetric functions III: Deformations of Cauchy and convolution algebras

open access: yesDiscrete Mathematics & Theoretical Computer Science, 1997
This paper discusses various deformations of free associative algebras and of their convolution algebras. Our main examples are deformations of noncommutative symmetric functions related to families of idempotents in descent algebras, and a simple q-
Gérard H. E. Duchamp   +3 more
doaj  

Free p-algebras revisited: An algebraic investigation of implication-free intuitionism

open access: yesAnnals of Pure and Applied Logic
We give a new construction of free distributive p-algebras. Our construction relies on a detailed description of completely meet-irreducible congruences, so it is purely universal algebraic. It yields a normal form theorem for p-algebra terms, simpler proofs of several existing results, as well as a complete characterisation of structurally complete ...
Tomasz Kowalski, Katarzyna Słomczyńska
openaire   +6 more sources

Asymptotic freeness in tracial ultraproducts

open access: yesForum of Mathematics, Sigma
We prove novel asymptotic freeness results in tracial ultraproduct von Neumann algebras. In particular, we show that whenever $M = M_1 \ast M_2$ is a tracial free product von Neumann algebra and $u_1 \in \mathscr U(M_1)$ , $u_2 \in ...
Cyril Houdayer, Adrian Ioana
doaj   +1 more source

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