A characterization of the Čech homology theory
S. K. Kaul (1970)
Colloquium Mathematicae
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S. K. Kaul (1970)
Colloquium Mathematicae
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Takuma Imamura (2021)
Archivum Mathematicum
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In this paper, we clarify the relationship among the Vietoris-type homology theories and the microsimplicial homology theories, where the latter are nonstandard homology theories defined by M.C. McCord (for topological spaces), T. Korppi (for completely regular topological spaces) and the author (for uniform spaces). We show that McCord’s and our homology are isomorphic for all compact uniform spaces and that Korppi’s and our homology are isomorphic for all fine uniform spaces. Our homology...
Józef H. Przytycki, Radmila Sazdanović (2014)
Fundamenta Mathematicae
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The goal of this paper is to address A. Shumakovitch's conjecture about the existence of ℤ₂-torsion in Khovanov link homology. We analyze torsion in Khovanov homology of semi-adequate links via chromatic cohomology for graphs, which provides a link between link homology and the well-developed theory of Hochschild homology. In particular, we obtain explicit formulae for torsion and prove that Khovanov homology of semi-adequate links contains ℤ₂-torsion if the corresponding Tait-type graph...
Marian Mrozek, Bogdan Batko (2010)
Annales Polonici Mathematici
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We generalize the notion of cubical homology to the class of locally compact representable sets in order to propose a new convenient method of reducing the complexity of a set while computing its homology.
Bruns, Winfried, Vetter, Udo (1998)
Beiträge zur Algebra und Geometrie
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Alexander N. Shumakovitch (2014)
Fundamenta Mathematicae
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Khovanov homology is a recently introduced invariant of oriented links in ℝ³. It categorifies the Jones polynomial in the sense that the (graded) Euler characteristic of Khovanov homology is a version of the Jones polynomial for links. In this paper we study torsion of Khovanov homology. Based on our calculations, we formulate several conjectures about the torsion and prove weaker versions of the first two of them. In particular, we prove that all non-split alternating links have their...
Yu. T. Lisitsa, S. Mardešić (1986)
Banach Center Publications
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S. Dragotti, G. Magro, L. Parlato (2006)
Bollettino dell'Unione Matematica Italiana
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We give, here, a geometric treatment of intersection homology theory.
Daniel Krasner (2009)
Fundamenta Mathematicae
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We investigate the Khovanov-Rozansky invariant of a certain tangle and its compositions. Surprisingly the complexes we encounter reduce to ones that are very simple. Furthermore, we discuss a "local" algorithm for computing Khovanov-Rozansky homology and compare our results with those for the "foam" version of sl₃-homology.
A. Blanco, J. Majadas, A.G. Rodicio (1996)
Inventiones mathematicae
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Z. Fiedorowicz, T. Pirashvili (1995)
Mathematische Annalen
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Gregory R. Conner, Samuel M. Corson (2016)
Fundamenta Mathematicae
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We show that the first homology group of a locally connected compact metric space is either uncountable or finitely generated. This is related to Shelah's well-known result (1988) which shows that the fundamental group of such a space satisfies a similar condition. We give an example of such a space whose fundamental group is uncountable but whose first homology is trivial, showing that our result does not follow from Shelah's. We clarify a claim made by Pawlikowski (1998) and offer...
Krzysztof K. Putyra (2014)
Banach Center Publications
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We create a framework for odd Khovanov homology in the spirit of Bar-Natan's construction for the ordinary Khovanov homology. Namely, we express the cube of resolutions of a link diagram as a diagram in a certain 2-category of chronological cobordisms and show that it is 2-commutative: the composition of 2-morphisms along any 3-dimensional subcube is trivial. This allows us to create a chain complex whose homotopy type modulo certain relations is a link invariant. Both the original and...
Laure Helme-Guizon, Józef H. Przytycki, Yongwu Rong (2006)
Fundamenta Mathematicae
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Khovanov homology for knots has generated a flurry of activity in the topology community. This paper studies the Khovanov type cohomology for graphs with a special attention to torsion. When the underlying algebra is ℤ[x]/(x²), we determine precisely those graphs whose cohomology contains torsion. For a large class of algebras, we show that torsion often occurs. Our investigation of torsion led to other related general results. Our computation could potentially be used to predict the...
R. Mark Goresky (1984)
Commentarii mathematici Helvetici
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Bijan Sahamie (2013)
Annales de la faculté des sciences de Toulouse Mathématiques
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This paper provides an introduction to the basics of Heegaard Floer homology with some emphasis on the hat theory and to the contact geometric invariants in the theory. The exposition is designed to be comprehensible to people without any prior knowledge of the subject.
Karl Heinz Fieseler, Ludger Kaup (1988)
Banach Center Publications
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Ludger Kaup, Karl-Heinz Fieseler (1988)
Mathematische Zeitschrift
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Magnus Jacobsson (2004)
Fundamenta Mathematicae
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We present an elementary description of Khovanov's homology of tangles [K2], in the spirit of Viro's paper [V]. The formulation here is over the polynomial ring ℤ[c], unlike [K2] where the theory was presented over the integers only.
Chung-Wu Ho (1975)
Colloquium Mathematicae
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Reinhold Hübl (1992)
Manuscripta mathematica
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