Results 21 to 30 of about 88,617 (232)

Twisted partial actions of Hopf algebras [PDF]

open access: yes, 2011
In this work, the notion of a twisted partial Hopf action is introduced as a unified approach for twisted partial group actions, partial Hopf actions and twisted actions of Hopf algebras.
A. Paques   +34 more
core   +1 more source

Solving equations over small unary algebras [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
We consider the problem of solving a system of polynomial equations over fixed algebra $A$ which we call MPolSat($A$). We restrict ourselves to unary algebras and give a partial characterization of complexity of MPolSat($A$). We isolate a preorder $P(A)$
Przemyslaw Broniek
doaj   +1 more source

Unbounded Conditional Expectations for Partial O∗-Algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2009
The main purpose of this paper is to generalize studies of unbounded conditional expectations for O∗-algebras to those for partial O∗-algebras.
Mayumi Takakura
doaj   +1 more source

Pointers in Recursion: Exploring the Tropics [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2019
We translate the usual class of partial/primitive recursive functions to a pointer recursion framework, accessing actual input values via a pointer reading unit-cost function.
Paulin Jacobé de Naurois
doaj   +1 more source

Representation theory of partial relation extensions [PDF]

open access: yes, 2019
Let C be a finite dimensional algebra of global dimension at most two. A partial relation extension is any trivial extension of C by a direct summand of its relation C-C-bimodule.
Assem, Ibrahim   +4 more
core   +4 more sources

On the Existence Problem of Finite Bases of Identities in the Algebras of Recursive Functions

open access: yesМоделирование и анализ информационных систем, 2020
Raphael Robinson showed that all primitive recursive functions depending on one argument, and only they could be obtained from two functions s(x) = x +1 and q(x) = x - [√x]² by using operations of addition +, superposition ∗ and iteration i.
Valery A. Sokolov
doaj   +1 more source

Which Arithmetical Data Types Admit Fracterm Flattening?

open access: yesScientific Annals of Computer Science, 2022
The formal theory of division in arithmetical algebras reconstructs fractions as syntactic objects called fracterms. Basic to calculation, is the simplification of fracterms to fracterms with one division operator, a process called fracterm ...
Jan A. Bergstra, John V. Tucker
doaj   +1 more source

Fully representable and *-semisimple topological partial *-algebras

open access: yes, 2012
We continue our study of topological partial *-algebras, focusing our attention to *-semisimple partial *-algebras, that is, those that possess a {multiplication core} and sufficiently many *-representations.
Antoine, J-P.   +2 more
core   +1 more source

Bitraces on Partial O*-Algebras

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2007
Unbounded bitraces on partial O*-algebras are considered, a class of ideals defined by them is exhibited, and several relationships between certain commutants, bicommutants, and tricommutants associated with the *-representations and ...
G. O. S. Ekhaguere
doaj   +1 more source

Infinite-dimensional Categorical Quantum Mechanics [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2017
We use non-standard analysis to define a category *Hilb suitable for categorical quantum mechanics in arbitrary separable Hilbert spaces, and we show that standard bounded operators can be suitably embedded in it.
Stefano Gogioso, Fabrizio Genovese
doaj   +1 more source

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