Results 111 to 120 of about 6,115 (235)

Transfers for ramified covering maps in homology and cohomology

International Journal of Mathematics and Mathematical Sciences, 2006
Making use of a modified version, due to McCord, of the Dold-Thom construction of ordinary homology, we give a simple topological definition of a transfer for ramified covering maps in homology with arbitrary coefficients.
Marcelo A. Aguilar, Carlos Prieto
doaj   +1 more source

Computational Tools for Cohomology of Toric Varieties

Advances in High Energy Physics, 2011
Novel nonstandard techniques for the computation of cohomology classes on toric varieties are summarized. After an introduction of the basic definitions and properties of toric geometry, we discuss a specific computational algorithm for the determination
Ralph Blumenhagen, Benjamin Jurke, Thorsten Rahn   +2 more
doaj   +1 more source

One-dimensional super Calabi-Yau manifolds and their mirrors

Journal of High Energy Physics, 2017
We apply a definition of generalised super Calabi-Yau variety (SCY) to supermanifolds of complex dimension one. One of our results is that there are two SCY’s having reduced manifold equal to ℙ 1 $$ {\mathrm{\mathbb{P}}}^1 $$ , namely the projective ...
S. Noja, S. L. Cacciatori, F. Dalla Piazza, A. Marrani, R. Re   +4 more
doaj   +1 more source

COMPATIBLE SYSTEMS OF GALOIS REPRESENTATIONS ASSOCIATED TO THE EXCEPTIONAL GROUP $E_{6}$

Forum of Mathematics, Sigma, 2019
We construct, over any CM field, compatible systems of $l$-adic Galois representations that appear in the cohomology of algebraic varieties and have (for all $l$) algebraic monodromy groups equal to the exceptional group of type $E_{6}$.
GEORGE BOXER, FRANK CALEGARI, MATTHEW EMERTON, BRANDON LEVIN, KEERTHI MADAPUSI PERA, STEFAN PATRIKIS   +5 more
doaj   +1 more source

Symplectic Bott-Chern cohomology of solvmanifolds

, 2013
We study the symplectic Bott-Chern cohomology by L.-S. Tseng and S.-T.
Daniele Angella, Hisashi Kasuya, Kasuya, Hisashi, Angella, Daniele   +3 more
core  

Vanishing results for the cohomology of complex toric hyperplane complements [PDF]

Suppose R is the complement of an essential arrangement of toric hyperlanes in the complex torus and ? = ?1(R). We show that H*(R;A) vanishes except in the top degree n when A is one of the following systems of local coefficients: (a) a system of ...
Simona Settepanella, Mike W. Davis
core  

Acylindrical hyperbolicity of groups acting on trees

, 2015
We provide new examples of acylindrically hyperbolic groups arising from actions on simplicial trees. In particular, we consider amalgamated products and HNN-extensions, 1-relator groups, automorphism groups of polynomial algebras, 3-manifold groups and ...
Osin, Denis, Denis Osin, Ashot Minasyan, Minasyan, Ashot   +3 more
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The prolongation of central extensions [PDF]

International Journal of Group Theory, 2012
The aim of this paper is to study the $( alpha, gamma)$-prolongation of central extensions. We obtain the obstruction theory for $( alpha, gamma)$-prolongations and classify $( alpha, gamma)$-prolongations thanks to low-dimensional cohomology groups of ...
Nguyen Tien Quang, Pham Thi Cuc, Che Thi Kim Phung   +2 more
doaj  

The homotopy type of toric arrangements [PDF]

A toric arrangement is a finite set of hypersurfaces in a complex torus, every hypersurface being the kernel of a character. In the present paper we build a CW-complex S homotopy equivalent to the arrangement complement ℜ x, with a combinatorial ...
Luca Moci, Simona Settepanella
core  

Centralisers of finite subgroups in soluble groups of type FPn

, 2009
We show that for soluble groups of type FPn , centralisers of finite subgroups need not be of type ...
Martínez-Pérez, Conchita, Nucinkis, Brita E.A., Martinez-Perez, C, Kochloukova, Dessislava H., Kochloukova, DH, Nucinkis, BEA   +5 more
core   +1 more source