Results 21 to 30 of about 846,182 (334)

Higher degree Killing forms on 2-step nilmanifolds

open access: bronzeJournal of Algebra, 2020
22 pages. v3: the proof of Proposition 3.2.
Viviana del Barco, Andrei Moroianu
openalex   +5 more sources

Killing forms on quaternion-Kähler manifolds [PDF]

open access: yesAnnals of Global Analysis and Geometry, 2005
We show that every Killing p-form on a compact quaternion-K hler manifold has to be parallel for p greater than 1.
Moroianu, Andrei, Semmelmann, Uwe
openaire   +6 more sources

Basic gravitational currents and Killing–Yano forms [PDF]

open access: yesGeneral Relativity and Gravitation, 2010
Comment: 11 ...
Acik, O.   +3 more
openaire   +4 more sources

Conformal Killing forms on nearly Kähler manifolds [PDF]

open access: yesDifferential Geometry and its Applications, 2020
10 ...
Naveira, Antonio M., Semmelmann, Uwe
openaire   +3 more sources

Fluxes in M-theory on 7-manifolds and G structures [PDF]

open access: yes, 2003
We consider warp compactifications of M-theory on 7-manifolds in the presence of 4-form fluxes and investigate the constraints imposed by supersymmetry. As long as the 7-manifold supports only one Killing spinor we infer from the Killing spinor equations
A. Bilal   +27 more
core   +5 more sources

Special Killing forms on toric Sasaki–Einstein manifolds [PDF]

open access: greenPhysica Scripta, 2014
In this paper we study the interplay between complex coordinates on the Calabi-Yau metric cone and the special Killing forms on the toric Sasaki-Einstein manifold. In the general case we give a procedure to locally construct the special Killing forms. In the final part we exemplify the general scheme in the case of the $5-$dimensional $Y^{p,q}$ spaces,
Vladimir Slesar   +2 more
openalex   +4 more sources

Killing forms on symmetric spaces

open access: yesDifferential Geometry and its Applications, 2006
Killing forms on Riemannian manifolds are differential forms whose covariant derivative is totally skew--symmetric. We show that a compact simply connected symmetric space carries a non--parallel Killing $p$--form ($p\ge2$) if and only if it isometric to a Riemannian product $S^k\times N$, where $S^k$ is a round sphere and $k>p$.
Belgun, Florin   +2 more
openaire   +3 more sources

N = 4 near-horizon geometries in D = 11 supergravity

open access: yesJournal of High Energy Physics, 2021
Extreme near-horizon geometries in D = 11 supergravity preserving four supersymmetries are classified. It is shown that the Killing spinors fall into three possible orbits, corresponding to pairs of spinors defined on the spatial cross-sections of the ...
D. Farotti, J. Gutowski
doaj   +1 more source

Conformal Killing–Yano 2-forms

open access: yesDifferential Geometry and its Applications, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Andrada, Adrián Marcelo   +1 more
openaire   +3 more sources

Eigenvalue Estimates of the ${\rm spin}^c$ Dirac Operator and Harmonic Forms on K\"ahler-Einstein Manifolds [PDF]

open access: yes, 2015
We establish a lower bound for the eigenvalues of the Dirac operator defined on a compact K\"ahler-Einstein manifold of positive scalar curvature and endowed with particular ${\rm spin}^c$ structures.
Nakad, Roger, Pilca, Mihaela
core   +1 more source

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