Results 1 to 10 of about 27,485 (190)
Cohomology of bundles on homological Hopf manifold
, 2008 We discuss the properties of complex manifolds having rational homology of $S^1 \times S^{2n-1}$ including those constructed by Hopf, Kodaira and Brieskorn-van de Ven.
A. Andreotti +27 more
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Abelian simply transitive affine groups of symplectic type [PDF]
, 2001 We construct a model space $C(\gsp(\bR^{2n}))$ for the variety of Abelian simply transitive groups of affine transformations of type ${\rm Sp}(\bR^{2n})$.
Baues, Oliver, Cortes, Vicente
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The Heisenberg group and conformal field theory
, 2011 A mathematical construction of the conformal field theory (CFT) associated to a compact torus, also called the "nonlinear Sigma-model" or "lattice-CFT", is given.
Posthuma, Hessel
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Isospectral manifolds with different local geometries
, 2000 We construct several new classes of isospectral manifolds with different local geometries. After reviewing a theorem by Carolyn Gordon on isospectral torus bundles and presenting certain useful specialized versions (Chapter 1) we apply these tools to ...
Schueth, Dorothee
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Elliptic Operators and Higher Signatures
, 2004 Building on the theory of elliptic operators, we give a unified treatment of the following topics: - the problem of homotopy invariance of Novikov's higher signatures on closed manifolds; - the problem of cut-and-paste invariance of Novikov's higher ...
Leichtnam, Eric, Piazza, Paolo
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E7(7) formulation of N=2 backgrounds
, 2009 In this paper we reformulate N=2 supergravity backgrounds arising in type II string theory in terms of quantities transforming under the U-duality group E7(7). In particular we combine the Ramond--Ramond scalar degrees of freedom together with the O(6,6)
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Existence and uniqueness theorem for convex polyhedral metrics on compact surfaces [PDF]
, 2010 We state that any constant curvature Riemannian metric with conical singularities of constant sign curvature on a compact (orientable) surface $S$ can be realized as a convex polyhedron in a Riemannian or Lorentzian) space-form.
Fillastre, François
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An Analysis of the Representations of the Mapping Class Group of a Multi-Geon Three-Manifold
, 1997 It is well known that the inequivalent unitary irreducible representations (UIR's) of the mapping class group $G$ of a 3-manifold give rise to ``theta sectors'' in theories of quantum gravity with fixed spatial topology.
Fuks-Rabinovich D. I. +7 more
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Characterization of finite groups generated by reflections and rotations
, 2016 We characterize finite groups G generated by orthogonal transformations in a finite-dimensional Euclidean space V whose fixed point subspace has codimension one or two in terms of the corresponding quotient space V/G with its quotient piecewise linear ...
Lange, Christian
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Symplectic spinors and Hodge theory [PDF]
, 2017 Results on symplectic spinors and their higher spin versions, concerning representation theory and cohomology properties are presented. Exterior forms with values in the symplectic spinors are decomposed into irreducible modules including finding the ...
Krýsl, Svatopluk
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