Results 21 to 30 of about 530 (201)

Elementary definability of the class of universal hypergraphic automata in the class of semigroups [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2022
Hypergraphic automata are automata, state sets and output symbol sets of which are hypergraphs, being invariant under actions of transition and output functions. Universally attracting objects in the category of hypergraphic automata are called universal
Molchanov, Vladimir Aleksandrovich   +1 more
doaj   +1 more source

Contractification of a Semigroup of Maps [PDF]

open access: yesProceedings of the American Mathematical Society, 1979
Let ( X , τ
Ko, Hwei-Mei, Tan, Kok-Keong
openaire   +2 more sources

On the semigroup of differentiable mappings (II) [PDF]

open access: yesGlasgow Mathematical Journal, 1972
In [2], K. D. Magill, Jr. has proved that every automorphism of the semigroup (with respect to composition) of all real-valued differentiable functions of a real variable is inner. The purpose of this paper is to generalize this fact to arbitrary finite-dimensional real Banach spaces.
Wood, G. R., Yamamuro, Sadayuki
openaire   +2 more sources

Some Characterizations for a Family of Nonexpansive Mappings and Convergence of a Generated Sequence to Their Common Fixed Point

open access: yesFixed Point Theory and Applications, 2010
Motivated by the method of Xu (2006) and Matsushita and Takahashi (2008), we characterize the set of all common fixed points of a family of nonexpansive mappings by the notion of Mosco convergence and prove strong convergence theorems for nonexpansive ...
Kazuhide Nakajo, Yasunori Kimura
doaj   +2 more sources

Semigroup Actions of Expanding Maps [PDF]

open access: yesJournal of Statistical Physics, 2016
A few typos were corrected, Sections 8 and 9 were improved and a variational relation for the relative entropy has been included in Section ...
Maria Carvalho   +2 more
openaire   +4 more sources

Fixed point theorems for a semigroup of total asymptotically nonexpansive mappings in uniformly convex Banach spaces [PDF]

open access: yesOpuscula Mathematica, 2014
In this paper, we provide existence and convergence theorems of common fixed points for left (or right) reversible semitopological semigroups of total asymptotically nonexpansive mappings in uniformly convex Banach spaces.
Suthep Suantai, Withun Phuengrattana
doaj   +1 more source

On a Class of Differential Variational Inequalities in Infinite-Dimensional Spaces

open access: yesMathematics, 2021
A new class of differential variational inequalities (DVIs), governed by a variational inequality and an evolution equation formulated in infinite-dimensional spaces, is investigated in this paper.
Savin Treanţă
doaj   +1 more source

On certain semigroups of contraction mappings of a finite chain [PDF]

open access: yes, 2021
Let [n] = {1, 2, . . . , n} be a finite chain and let Pn (resp. , Tn) be the semigroup of partial transformations on [n] (resp. , full transformations on [n]). Let CPn = {α ∈ Pn : (for all x, y ∈ Dom α) |xα−yα| ≤ |x−y|} (resp. , CT n = {α ∈ Tn : (for all
Zubairu, M.M., Umar, A.
core   +1 more source

The Bergman property for semigroups [PDF]

open access: yes, 2009
In this article, we study the Bergman property for semigroups and the associated notions of cofinality and strong cofinality. A large part of the paper is devoted to determining when the Bergman property, and the values of the cofinality and strong ...
Ruskuc, N.   +7 more
core   +1 more source

Generating continuous mappings with Lipschitz mappings [PDF]

open access: yes, 2007
If X is a metric space, then C-X and L-X denote the semigroups of continuous and Lipschitz mappings, respectively, from X to itself. The relative rank of C-X modulo L-X is the least cardinality of any set U\L-X where U generates C-X. For a large class of
Mitchell, James David   +2 more
core   +1 more source

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