On the Cohomology Ring of a Simple Hyperkähler Manifold (On the Results of Verbitsky).
F.A. Bogomolov (1996)
Geometric and functional analysis
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F.A. Bogomolov (1996)
Geometric and functional analysis
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Mikiya Masuda (1981)
Mathematische Zeitschrift
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W. Jakobsche (1991)
Fundamenta Mathematicae
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Hüttemann, Thomas (2011)
Serdica Mathematical Journal
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2010 Mathematics Subject Classification: Primary 18G35; Secondary 55U15. We consider non-standard totalisation functors for double complexes, involving left or right truncated products. We show how properties of these imply that the algebraic mapping torus of a self map h of a cochain complex of finitely presented modules has trivial negative Novikov cohomology, and has trivial positive Novikov cohomology provided h is a quasi-isomorphism. As an application we obtain a new...
W. Kucharz (2005)
Annales Polonici Mathematici
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A Nash cohomology class on a compact Nash manifold is a mod 2 cohomology class whose Poincaré dual homology class can be represented by a Nash subset. We find a canonical way to define Nash cohomology classes on an arbitrary compact smooth manifold M. Then the Nash cohomology ring of M is compared to the ring of algebraic cohomology classes on algebraic models of M. This is related to three conjectures concerning algebraic cohomology classes.
Andrzej Czarnecki (2014)
Annales Polonici Mathematici
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A characterisation of trivial 1-cohomology, in terms of some connectedness condition, is presented for a broad class of metric spaces.
Yau, Donald (2003)
International Journal of Mathematics and Mathematical Sciences
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Mohammad Parhizgar (1997)
Mathematica Scandinavica
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Norman E. Hurt (1972)
Annales de l'I.H.P. Physique théorique
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G. TSAGAS (1970)
Mathematische Annalen
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Giovanni Gaiffi (1996)
Manuscripta mathematica
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Jean-Claude Hausmann, Allen Knutson (1998)
Annales de l'institut Fourier
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We compute the integer cohomology rings of the “polygon spaces”introduced in [F. Kirwan, Cohomology rings of moduli spaces of vector bundles over Riemann surfaces, J. Amer. Math. Soc., 5 (1992), 853-906] and [M. Kapovich & J. Millson, the symplectic geometry of polygons in Euclidean space, J. of Diff. Geometry, 44 (1996), 479-513]. This is done by embedding them in certain toric varieties; the restriction map on cohomology is surjective and we calculate its kernel using ideas from...
Piotr Pragacz, Jan Ratajski (2003)
Fundamenta Mathematicae
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We study the cohomology ring of the Grassmannian G of isotropic n-subspaces of a complex 2m-dimensional vector space, endowed with a nondegenerate orthogonal form (here 1 ≤ n < m). We state and prove a formula giving the Schubert class decomposition of the cohomology products in H*(G) of general Schubert classes by "special Schubert classes", i.e. the Chern classes of the dual of the tautological vector bundle of rank n on G. We discuss some related properties of reduced decompositions...
Pierre Berthelot (2012)
Rendiconti del Seminario Matematico della Università di Padova
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John W. Rutter (1976)
Colloquium Mathematicae
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