Results 31 to 40 of about 4,586,045 (294)

Existence and Data Dependence of Fixed Points and Strict Fixed Points for Contractive-Type Multivalued Operators

open access: yesFixed Point Theory and Applications, 2007
The purpose of this paper is to present several existence and data dependence results of the fixed points of some multivalued generalized contractions in complete metric spaces. As for application, a continuation result is given.
Cristian Chifu, Gabriela Petruşel
doaj   +2 more sources

Fixed Points for w-Contractive Multimaps

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2009
Using the generalized Caristi's fixed point theorems we prove the existence of fixed points for self and nonself multivalued weakly w-contractive maps.
Abdul Latif, Marwan A. Kutbi
doaj   +1 more source

Entropy as a Fixed Point

open access: yesTheoretical Computer Science, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Related G-metrics and Fixed Points

open access: yesAnnals of the West University of Timisoara: Mathematics and Computer Science, 2018
For a single valued mapping T in a G-complete G-metric space (X, d), we show that if Tn,for some n> 1, is a contraction, then T itself is a contraction under another related G-metric d′. We establish moreover that if T is uniformly continuous, then d′ is
Gaba Yaé Ulrich O.
doaj   +1 more source

Fixed point algebras [PDF]

open access: yesBulletin of the American Mathematical Society, 1982
A fixed point algebra (FPA) is a pair \(\) of Boolean algebras satisfying the following properties: (1) Each \(\alpha \in B\) is a mapping from A into A; (2) Boolean operations in B are pointwise on A; (3) each constant mapping on A is an element of B; (4) each \(\alpha \in B\) has a fixed point in A.
openaire   +2 more sources

Unique fixed points vs. least fixed points

open access: yesTheoretical Computer Science, 1980
AbstractThe aim of this paper is to compare two approaches to the semantics of programming languages: the least fixed point approach, and the unique fixed point approach. Briefly speaking, we investigate here the problem of existence of extensions of algebras with the unique fixed point property to ordered algebras with the least fixed point property ...
openaire   +2 more sources

On fixed points of permutations [PDF]

open access: yesJournal of Algebraic Combinatorics, 2008
The number of fixed points of a random permutation of 1,2,...,n has a limiting Poisson distribution. We seek a generalization, looking at other actions of the symmetric group. Restricting attention to primitive actions, a complete classification of the limiting distributions is given.
Diaconis, Persi   +2 more
openaire   +3 more sources

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan   +18 more
wiley   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider   +15 more
wiley   +1 more source

Evidence‐Informed Multidisciplinary Consensus Guidance for the Psychosocial Care of Adolescents With High‐Risk Cancer: Recommendations From the Italian Association of Pediatric Hematology and Oncology

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adolescents with high‐risk cancer face complex developmental, psychosocial, and ethical challenges that extend beyond disease‐directed treatment. Although international recommendations exist for communication, psychosocial care, pediatric palliative care, survivorship, and shared decision‐making, these have largely evolved within ...
Johanna M. C. Blom   +15 more
wiley   +1 more source

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