Results 41 to 50 of about 2,431,660 (294)
Boundary Value Problems, 2009 We establish the existence and uniqueness of a positive and nondecreasing solution to a singular boundary value problem of a class of nonlinear fractional differential equation. Our analysis relies on a fixed point theorem in partially ordered sets.
J. Caballero Mena +2 more
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Partially Ordered Sets in Socio-Economic Data Analysis
EncyclopediaA partially ordered set (or a poset, for short) is a set endowed with a partial order relation, i.e., with a reflexive, anti-symmetric, and transitive binary relation.
Marco Fattore, Lucio De Capitani
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Witt rings of quadratically presentable fields [PDF]
Categories and General Algebraic Structures with Applications, 2020 This paper introduces an approach to the axiomatic theory of quadratic forms based on {tmem{presentable}} partially ordered sets, that is partially ordered sets subject to additional conditions which amount to a strong form of local presentability.
Pawel Gladki, Krzysztof Worytkiewicz
doaj
On generalized derivations of partially ordered sets [PDF]
, 2019 summary:Let $P$ be a poset and $d$ be a derivation on $P$. In this research, the notion of generalized $d$-derivation on partially ordered sets is presented and studied. Several characterization theorems on generalized $d$-derivations are introduced. The
Abdelwanis, Ahmed Y., Boua, Abdelkarim
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Pediatric 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
Matroids on Partially Ordered Sets
Advances in Applied Mathematics, 1998 The concept of a matroid is known to be a fundamental concept in combinatorics and it is also known to be ubiquitous in mathematics in general (e.g., stratification of Grassmanians, arrangements of hyperplanes, optimization). In the literature there exist attempts to generalize this concept.
Barnabei, Marilena +2 more
openaire +1 more source
Fundamentals of Partially Ordered Sets [PDF]
, 1968 Gives the basic definitions and theorems of similar partially ordered sets; studies finite partially ordered sets, including the problem of combinatorial analysis; and includes the ideas of complete, dense, and continuous partially ordered sets ...
Compton, Lewis W.
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Survivors of pediatric brain tumors (PBTs) can experience long‐term social difficulties, impacting quality of life. Beyond medical and environmental factors, family psychosocial risk may play a role in social outcomes by shaping the caregiving environment and may provide intervention options.
Renske H. Houben +4 more
wiley +1 more source
Ordered fuzzy rings and substructures: Operations, homomor-phisms, and convex structures [PDF]
Journal of Fuzzy Extension and ApplicationsThis study advances the theoretical framework of ordered fuzzy rings (OFRs) by examining the structural relationships among ordered fuzzy subrings (OFSRs) and ordered fuzzy ideals (OF Is).
Faisal Mehmood +3 more
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Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Japan has one of the highest dialysis prevalence rates worldwide and a shrinking, aging population. Whether dialysis burden has entered a sustained post‐peak phase or whether recent declines partly reflect pandemic‐related disruptions remains uncertain.
Hatice Şahin +2 more
wiley +1 more source