Results 111 to 120 of about 9,055,555 (174)

Symplectic manifolds and cohomological decomposition [PDF]

, 2012
Given a closed symplectic manifold, we study when the Lefschetz decomposition induced by the $\mathfrak{sl}(2;\mathbb{R})$-representation yields a decomposition of the de Rham cohomology.
Daniele Angella, Tomassini, Adriano, Adriano Tomassini, Angella, Daniele   +3 more
core  

Antea Group Archeologie 2020/72

, 2020
Auteurs: R. Fens & I. Fleuren rapportvolgnummer: 2020/72 Antea Group projectnummer 271507 ARCHIS-nr 4856764100 Het plangebied ligt langs de voormalige Zuiderzeekust. De vestingstad Muiden, een van oorsprong middeleeuwse stad, bevindt zich aan de monding
Koopmanschap, H (Antea Group), Fens, R. (Antea Group), Jong, M. de (Antea Group), Kauling, T.A. (Antea Group), Van der Veen, V. (Antea Group), Thasing, S (Antea Group), Brokke, A. (Antea Group), Fleuren, I (Antea Group), Fleuren, I. (Antea Group), Fleuren, I (Antea Group), ProjectMember, Fens, R.L. (Antea Group), ProjectMember, Sibma, T (Antea Group), Fens, R., Brokke, A.J. (Antea Group), Uffink, V. (Antea Group), Fens, R.L. (Antea Group), Fens, R (Antea Group)   +16 more
core   +1 more source

Crystallography, group cohomology, and Lieb–Schultz–Mattis constraints

SciPost Physics
We compute the mod-2 cohomology ring for three-dimensional (3D) space groups and establish a connection between them and the lattice structure of crystals with space group symmetry.
Chunxiao Liu, Weicheng Ye
doaj   +1 more source

Abelian Extensions of Modified λ-Differential Left-Symmetric Algebras and Crossed Modules

Axioms
In this paper, we define a cohomology theory of a modified λ-differential left-symmetric algebra. Moreover, we introduce the notion of modified λ-differential left-symmetric 2-algebras, which is the categorization of a modified λ-differential left ...
Fuyang Zhu, Taijie You, Wen Teng
doaj   +1 more source

A construction of semi-infinite de Rham cohomology [PDF]

The purpose of this thesis is to describe a construction of semi-infinite de Rham cohomology for infinite dimensional manifolds equipped with the extra structure of a polarisation.
Stacey, Andrew Edgell
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From Gauge Anomalies to Gerbes and Gerbal Representations: Group Cocycles in Quantum Theory

Acta Polytechnica, 2010
In this paper I shall discuss the role of group cohomology in quantum mechanics and quantum field theory. First, I recall how cocycles of degree 1 and 2 appear naturally in the context of gauge anomalies.
J. Mickelsson
doaj  

An Eilenberg-Ganea phenomenon for actions with virtually cyclic stabilizers

, 2014
In dimension 3 and above, Bredon cohomology gives an acurate purely algebraic description of the minimal dimension of the classifying space for actions of a group with stabilisers in any given family of subgroups.
Martin G. Fluch, Ian J. Leary, Fluch, Martin, Leary, Ian   +3 more
core   +1 more source

Quantum carrollian bosonic strings

Journal of High Energy Physics
We study a recently discovered carrollian bosonic string, described classically by a sigma model where both the worldsheet and the target spacetime are carrollian.
José Figueroa-O’Farrill, Emil Have, Niels A. Obers   +2 more
doaj   +1 more source

The Configuration Space of Two Particles Moving on a Graph [PDF]

, 2010
In this thesis we study the configuration space, F (Γ, 2), of two particles moving without collisions on a graph Γ with a view to calculating the Betti numbers of this space. We develop an intersection theory for cycles in graphs inspired by the classical
BARNETT, KATHRYN
core  

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
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