Results 11 to 20 of about 24,392 (153)

New aspects of Argyres-Douglas theories and their dimensional reduction

open access: yesJournal of High Energy Physics, 2021
Argyres-Douglas (AD) theories constitute an infinite class of superconformal field theories in four dimensions with a number of interesting properties.
Simone Giacomelli   +2 more
doaj   +1 more source

On six-dimensional Vaisman — Gray submanifolds of the octave algebra

open access: yesДифференциальная геометрия многообразий фигур, 2019
The W1 + W4 class of almost Hermitian manifolds (in accordance with the Gray — Hervella classification) is usually named as the class of Vaisman — Gray manifolds.
M. Banaru
doaj   +1 more source

Special Types of Locally Conformal Closed G2-Structures

open access: yesAxioms, 2018
Motivated by known results in locally conformal symplectic geometry, we study different classes of G 2 -structures defined by a locally conformal closed 3-form.
Giovanni Bazzoni, Alberto Raffero
doaj   +1 more source

Weyl-parallel forms, conformal products and Einstein-Weyl manifolds [PDF]

open access: yes, 2010
Motivated by the study of Weyl structures on conformal manifolds admitting parallel weightless forms, we define the notion of conformal product of conformal structures and study its basic properties.
Belgun, Florin, Moroianu, Andrei
core   +1 more source

The Laplacian Flow of Locally Conformal Calibrated G2-Structures

open access: yesAxioms, 2019
We consider the Laplacian flow of locally conformal calibrated G 2 -structures as a natural extension to these structures of the well-known Laplacian flow of calibrated G 2 -structures.
Marisa Fernández   +2 more
doaj   +1 more source

Flat conformal structures on 3-manifolds. I. Uniformization of closed Seifert manifolds [PDF]

open access: yesJournal of Differential Geometry, 1993
This is the first in the series of three papers where we prove an existence theorem for flat conformal structures on finite-sheeted coverings over a wide class of Haken manifolds. In this paper we prove: Theorem 2.1. Let \(S(g,e)\) be a total space of a circle bundle over a closed orientable surface \(S_ g\) of a genus \(g\) having Euler number \(e \in
openaire   +2 more sources

Selfdual spaces with complex structures, Einstein-Weyl geometry and geodesics [PDF]

open access: yes, 1999
We study the Jones and Tod correspondence between selfdual conformal 4-manifolds with a conformal vector field and abelian monopoles on Einstein-Weyl 3-manifolds, and prove that invariant complex structures correspond to shear-free geodesic congruences ...
Calderbank, David M. J., Pedersen, H.
core   +5 more sources

Selfdual 4-Manifolds, Projective Surfaces, and the Dunajski-West Construction [PDF]

open access: yes, 2014
I present a construction of real or complex selfdual conformal 4-manifolds (of signature (2,2) in the real case) from a natural gauge field equation on a real or complex projective surface, the gauge group being the group of diffeomorphisms of a real or ...
Calderbank, David M. J.
core   +5 more sources

Weyl structures with special holonomy on compact conformal manifolds

open access: yes, 2023
21 pages; a flaw in the proof of Theorem 4.3 was ...
Belgun, Florin   +2 more
openaire   +2 more sources

On Riemannian manifolds endowed with a locally conformalcosymplectic structure [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
We deal with a locally conformal cosymplectic manifold M(φ, Ω, ξ, η, g) admitting a conformal contact quasi‐torse‐forming vector field T. The presymplectic 2‐form Ω is a locally conformal cosymplectic 2‐form. It is shown that T is a 3‐exterior concurrent vector field. Infinitesimal transformations of the Lie algebra of ∧M are investigated.
Ion Mihai, Radu Rosca, Valentin Ghişoiu
openaire   +2 more sources

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