Results 11 to 20 of about 151 (29)

The Group of Quasisymmetric Homeomorphisms of the Circle and Quantization of the Universal Teichm\"uller Space [PDF]

open access: yes, 2009
In the first part of the paper we describe the complex geometry of the universal Teichm\"uller space $\mathcal T$, which may be realized as an open subset in the complex Banach space of holomorphic quadratic differentials in the unit disc. The quotient $\
Sergeev, Armen G.
core   +6 more sources

Generalized twistor spaces for hyperkähler manifolds [PDF]

open access: yes, 2014
Let M be a hyperkaehler manifold. The S2-family of complex structures compatible with the hyperkaehler metric can be assembled into a single complex structure on Z = M × S2; the resulting complex manifold is known as the twistor space of M.
Glover, R., Sawon, J.
core   +2 more sources

Depositional Environment of Fine-Grained Sedimentary Rocks of the Sinamar Formation, Muara Bungo, Jambi [PDF]

open access: yes, 2013
DOI: 10.17014/ijog.v8i1.153The research area is situated in the northwestern side of South Sumatra Basin, which is a part of Muara Bungo Regency, Jambi Province.
Panggabean, H. (H), Zajuli, M. H. (M)
core   +1 more source

CR geometry and conformal foliations [PDF]

open access: yes, 2016
We use the CR geometry of the standard hyperquadric in ℂP3 to give a detailed twistor description of conformal foliations in Euclidean 3 ...
Baird, Paul, Eastwood, Michael
core   +1 more source

The G_2 sphere over a 4-manifold

open access: yes, 2006
We present a construction of a canonical G_2 structure on the unit sphere tangent bundle S_M of any given orientable Riemannian 4-manifold M. Such structure is never geometric or 1-flat, but seems full of other possibilities. We start by the study of the
A.L. Besse   +16 more
core   +1 more source

Self-duality and associated parallel or cocalibrated ${\mathrm{G}}_2$ structures [PDF]

open access: yes, 2019
We find a remarkable family of $\mathrm{G}_2$ structures defined on certain principal $\mathrm{SO}(3)$-bundles $P_\pm\longrightarrow M$ associated with any given oriented Riemannian 4-manifold $M$. Such structures are always cocalibrated.
Albuquerque, Rui
core   +2 more sources

Extended superalgebras from twistor and Killing spinors

open access: yes, 2017
The basic first-order differential operators of spin geometry that are Dirac operator and twistor operator are considered. Special types of spinors defined from these operators such as twistor spinors and Killing spinors are discussed. Symmetry operators
Ertem, Ümit
core   +1 more source

Exotica or the failure of the strong cosmic censorship in four dimensions [PDF]

open access: yes, 2015
In this letter a generic counterexample to the strong cosmic censor conjecture is exhibited. More precisely---taking into account that the conjecture lacks any precise formulation yet---first we make sense of what one would mean by a "generic ...
Etesi, Gábor
core   +2 more sources

Connections on non-symmetric (generalized) Riemannian manifold and gravity

open access: yes, 2015
Connections with (skew-symmetric) torsion on non-symmetric Riemannian manifold satisfying the Einstein metricity condition (NGT with torsion) are considered.
Ivanov, Stefan, Zlatanovic, Milan
core   +1 more source

Line bundles on spectral curves and the generalised Legendre transform construction of hyperkaehler metrics

open access: yes, 2008
An analogue of the correspondence between GL(k)-conjugacy classes of matricial polynomials and line bundles is given for K-conjugacy classes, where K is one of the following: maximal parabolic, maximal torus, GL(k-1) embedded diagonally.
Adams   +29 more
core   +1 more source

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