cohomology

(redirected from Cohomology class)

cohomology

(ˌkəʊhəˈmɒlədʒɪ)
n
the abstract study of algebraic topology
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If F is non-separating, we work on the infinite cyclic covering space of M defined by a cohomology class dual to F.
be the infinite cyclic covering of M, given by the cohomology class dual to a choice of fibering.
The 16 papers, selected from 35 presentations, include discussions of primitive cycles and the Fourier-Radon transform, the derivative of a normal function associated with a Deligne cohomology class, secondary theories for etale groupiods, finite generation conjectures for motivic cohomology theories over finite fields, and derived categories of coherent sheaves and motives of K3 surfaces.
To any such P we can associate a cohomology class a(P) [member of] [H.
k], [for all]g [member of] G and [sigma] represents a second cohomology class by Lemma 4.
For the character triple (G, K, [xi]), a cohomology class of G/K (an element of [H.
F]] will not appear in the model for any k if the cohomology class [theta[.
As with any obstruction theory, non-vanishing of a cohomology class [[[?
Thus [Omega] is closed and the corresponding cohomology class c(M) = [[Omega]] [element of] [H.
Let (M, [omega]) be a compact symplectic manifold whose symplectic form represents an integral de Rham cohomology class of M.
To our best knowledge there is no description for the 3-type in terms of some cohomology class.
By Poincare duality, there exists a cohomology class x [member of] [H.