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On strongly summable ultrafilters and union ultrafilters [PDF]
Transactions of the American Mathematical Society, 1987 We prove that union ultrafilters are essentially the same as strongly summable ultrafilters but ordered-union ultrafilters are not. We also prove that the existence of ultrafilters of these sorts implies the existence of P
Blass, Andreas, Hindman, Neil
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Ultrafilters and mappings [PDF]
Pacific Journal of Mathematics, 1983 The following types of continuous functions between completely regular spaces are considered: closed, quasi-perfect, d-, \(d^*\)-, d'-, sd-, sd'-, nd-cp-, \(d_ 1\)-, \(d_ 2\)-, *-open, Z-, WZ-, \(W^*\)-open, N-, WN-, \(W_ rN\)-, hyper-real. For the most types, a characterization in terms of closed or open ultrafilters is given.
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Application of Ultrafiltration, UV Radiation and Ozonation as Tertiary Treatment for Effluent of Isfahan North Wastewater Treatment Plant in Pilot Scale [PDF]
آب و فاضلاب, 2022 The aim of this study is the pilot performance evaluation and comparison of wastewater disinfection methods consisted of ultrafiltration, ultraviolet radiation and ozonation, to tertiary treatment and effluent quality improvement in Isfahan north ...
Mohammad Jamalinezhad +5 more
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MONOID ACTIONS AND ULTRAFILTER METHODS IN RAMSEY THEORY
Forum of Mathematics, Sigma, 2019 First, we prove a theorem on dynamics of actions of monoids by endomorphisms of semigroups. Second, we introduce algebraic structures suitable for formalizing infinitary Ramsey statements and prove a theorem that such statements are implied by the ...
SŁAWOMIR SOLECKI
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A non-discrete space X with Cp(X) Menger at infinity
Applied General Topology, 2019 In a paper by Bella, Tokgös and Zdomskyy it is asked whether there exists a Tychonoff space X such that the remainder of Cp(X) in some compactification is Menger but not σ-compact.
Angelo Bella +1 more
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Topology and its Applications, 2016 12 pages + 1 extra page at the end with a corrigendum concerning Theorems 4.2 and 4.3, please refer to this corrigendum before citing said ...
David J. Fernández-Bretón +1 more
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A rare case of pseudohyponatremia in a type IA choledochal cyst due to biliary obstruction
Journal of Pediatric Surgery Case Reports, 2023 A Type IA choledochal cyst is a cystic or fusiform dilatation of the common bile duct affecting the extrahepatic biliary tree. Here, we present a case report of a 3-year-old girl with a prenatal asymptomatic choledochal cyst that in size, leading to ...
Michail Aftzoglou +5 more
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Order, 2011 We present some new results on union ultrafilters. We characterize stability for union ultrafilters and, as the main result, we construct a new kind of unordered union ultrafilter.
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SOME REPRESENTATIONS CONNECTED WITH ULTRAFILTERS AND MAXIMAL LINKED SYSTEMS
Ural Mathematical Journal, 2017 Ultrafilters and maximal linked systems (MLS) of a lattice of sets are considered. Two following variants of topological equipment are investigated: the Stone and Wallman topologies.
Alexander G. Chentsov
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Axioms, 2023 For a quantale I, which is a unit interval endowed with a continuous triangular norm and the Barr extension β¯I of the ultrafilter monad to I-Rel, a characterization of the discrete presheaf monad associated to β¯I is given. It is also proved that, when &
Gao Zhang, Shaoqun Zhang
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