Results 11 to 20 of about 47 (44)

Hyperkähler Manifolds of Curves in Twistor Spaces? [PDF]

open access: yes, 2014
. We discuss hypercomplex and hyperkähler structures obtained from higher deg-ree curves in complex spaces fibring over P1. Key words: hyperkähler metrics; hypercomplex structures; twistor methods; projective curves 2010 Mathematics Subject ...
Roger Bielawski   +2 more
core   +2 more sources

Homogeneous quaternionic Kähler structures on rank-three Alekseevsky spaces [PDF]

open access: yes, 2011
15 págs. ; 2 tabs. ; A.M.S. Subject Classi cation 2010: 53C26, 53C30.The homogeneous quaternionic K ahler structures on the rank-three Alekseevsky spaces with their natural quaternionic structures, when each of them is described as a solvable Lie group,
Gadea, Pedro M.   +5 more
core   +1 more source

Invariant forms, associated bundles and Calabi-Yau metrics

open access: yes, 2007
We develop a method, initially due to Salamon, to compute the space of “invariant ” forms on an associated bundle X = P ×GV, with a suitable notion of invariance. We determine sufficient conditions for this space to be d-closed.
Diego Conti, CONTI D
core   +1 more source

Parallelizations on products of spheres and octonionic geometry

open access: yesComplex Manifolds, 2019
A classical theoremof Kervaire states that products of spheres are parallelizable if and only if at least one of the factors has odd dimension. Two explicit parallelizations on Sm × S2h−1 seem to be quite natural, and have been previously studied by the ...
Parton Maurizio, Piccinni Paolo
doaj   +1 more source

Complex quaternionic manifolds and C-projective structures

open access: yesComplex Manifolds
We discuss complex quaternionic manifolds, i.e., those that have holonomy GL(n,H)U(1) $GL\left(n,\mathbb{H}\right)U\left(1\right)$ , which naturally arise via quaternionic Feix–Kaledin construction.
Borówka Aleksandra
doaj   +1 more source

A remark on the second order estimates for the quaternionic Calabi–Yau problem on hyperkähler manifolds

open access: yesComplex Manifolds
We revisit the second order estimate for solutions to the quaternionic Calabi–Yau problem on hyperkähler manifolds, originally established by Dinew and Sroka in [S. Dinew and M.
Gentili Giovanni, Vezzoni Luigi
doaj   +1 more source

On almost hyperHermitian structures on Riemannian manifolds and tangent bundles

open access: yesOpen Mathematics, 2004
Bogdanovich Serge, Ermolitski Alexander
doaj   +1 more source

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