Results 21 to 30 of about 7,637,178 (292)

On Classification of Semigroup N by Green’s Theorem

open access: yesJournal of Mathematics, 2022
In previous papers, it has been recently defined a new class of semigroups based on both Rees matrix and completely 0-simple semigroups. For this new structure, it has been introduced with certain basic properties and finiteness conditions. The main goal
Suha Wazzan, Nurten Urlu Ozalan
doaj   +1 more source

Some Spectral Properties of Schrödinger Operators on Semi Axis

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2023
The main aim of this work is to investigate some spectral properties of Schrödinger operators on semi axis. We first present the Schrödinger equation with a piecewise continuous potential function q so that the problem differs from the classical ...
İbrahim Erdal
doaj   +1 more source

Some conditions for finiteness of a ring

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1988
Extending a result of Putcha and Yaqub, we prove that a non-nil ring must be finite if it has both ascending chain condition and descending chain condition on non-nil subrings.
Howard E. Bell
doaj   +1 more source

Presentations of inverse semigroups, their kernels and extensions [PDF]

open access: yes, 2011
"Part of this work was done while Gray was an EPSRC Postdoctoral Research Fellow at the University of St Andrews, Scotland"Let S be an inverse semigroup and let π:S→T be a surjective homomorphism with kernel K.
Ruskuc, Nik   +8 more
core   +1 more source

On the Generic Finiteness of Equilibrium Outcome Distributions in Bimatrix Game Forms [PDF]

open access: yes, 2007
We provide an example of an outcome game form with two players for which there is in an open set of utilities for both players such that, in each of the associated games, the set of mixed Nash equilibria induces a continuum of outcome ...
Litan, Cristian M.   +7 more
core   +1 more source

Some conditions for finiteness and commutativity of rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1990
We present several new sufficient conditions for a ring to be finite; we give two conditions which for periodic rings R imply that R must be either finite or commutative; and we study commutativity in rings with only finitely many non-central subrings.
Howard E. Bell, Franco Guerriero
doaj   +1 more source

Topological finiteness properties of monoids Part 1: Foundations [PDF]

open access: yes, 2022
We initiate the study of higher-dimensional topological finiteness properties of monoids. This is done by developing the theory of monoids acting on CW complexes.
Gray, Robert, Steinberg, Benjamin
core   +1 more source

Finite entanglement entropy and spectral dimension in quantum gravity

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
What are the conditions on a field theoretic model leading to a finite entanglement entropy density? We prove two very general results: (1) Ultraviolet finiteness of a theory does not guarantee finiteness of the entropy density; (2) If the spectral ...
Michele Arzano, Gianluca Calcagni
doaj   +1 more source

Formations of Monoids, Congruences, and Formal Languages [PDF]

open access: yesScientific Annals of Computer Science, 2015
The main goal in this paper is to use a dual equivalence in automata theory started in [25] and developed in [3] to prove a general version of the Eilenberg-type theorem presented in [4].
A. Ballester-Bolinches   +3 more
doaj   +1 more source

Finiteness Conditions for Strictness Analysis

open access: yesDAIMI Report Series, 1993
We give upper bounds on the number of times the fixed point operator needs to be unfolded for strictness analysis of functional languages with lists. This extends previous work both in the syntax-directed nature of the approach and in the ability to deal with Wadler's method for analysing lists. Limitations of the method are indicated.
Flemming Nielson, Hanne Riis Nielson
openaire   +3 more sources

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