Results 21 to 30 of about 42,392 (191)

Real hypersurfaces of indefinite Kaehler manifolds

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
This article deals with generalizations of certain aspects of the well- established theory about Sasakian and Kählerian geometry to the pseudo- Riemannian situation. Sasakian manifolds with pseudo-Riemannian metrics were already studied by \textit{T. Takahashi} [Tohoku Math. J.
A. Bejancu, K. L. Duggal
openaire   +2 more sources

The computation of the index of a Morse function at a critical point

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1988
A theoretical approach in computing the index of a Morse function at a critical point on a real non-singular hypersurface V is given. As a consequence the Euler characteristic of V is computed. In the case where the hypersurface is polynomial and compact,
Takis Sakkalis
doaj   +1 more source

Integrability and level crossing manifolds in a quantum Hamiltonian system [PDF]

open access: yes, 1998
We consider a two-spin model, represented classically by a nonlinear autonomous Hamiltonian system with two degrees of freedom and a nontrivial integrability condition, and quantum mechanically by a real symmetric Hamiltonian matrix with blocks of ...
E. Magyari   +12 more
core   +3 more sources

On certain real hypersurfaces of quaternionic projective space

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1991
We classify certain real hypersurfaces ot a quaternionic projective space satisfying the condition σ(R(X,Y)SZ)=0.
Juan De Dios Perez, Florentino G. Santos
doaj   +1 more source

Topology of random real hypersurfaces

open access: yesRevista Colombiana de Matemáticas, 2014
These are notes of the mini-course I gave during the CIMPA summer school at Villa de Leyva, Colombia, in July $2014$. The subject was my joint work with Damien Gayet on the topology of random real hypersurfaces, restricting myself to the case of projective spaces and focusing on our lower estimates.
openaire   +6 more sources

Algebraicity of Global Real Analytic Hypersurfaces

open access: yesGeometriae Dedicata, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kurdyka, Krzysztof, Kucharz, Wojciech
openaire   +3 more sources

On the Ricci tensor of real hypersurfaces of quaternionic projective space

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1996
We study some conditions on the Ricci tensor of real hypersurfaces of quaternionic projective space obtaining among other results an improvement of the main theorem in [9].
Juan De Dios Perez
doaj   +1 more source

Interacting components

open access: yesTechne, 2021
Since my entrance into the architectural area at the end of the eighties of the last century and more intensively after I was appointed professor from practice at the Faculty of Architecture at the TU Delft just after the millennium shift, I have written
Kas Oosterhuis
doaj   +1 more source

COMPLEX SUBMANIFOLDS IN REAL HYPERSURFACES [PDF]

open access: yesJournal of the Korean Mathematical Society, 2010
Let M be a C 1 real hypersurface in C n+1 , n ‚ 1, locally given as the zero locus of a C 1 real valued function r that is defined on a neighborhood of the reference point P 2 M. For each k = 1,...,n we present a necessary and sucient condition for there to exist a complex manifold of dimension k through P that is contained in M, assuming the Levi form
Chong-Kyu Han, Giuseppe Tomassini
openaire   +1 more source

The tadpole conjecture in the interior of moduli space

open access: yesJournal of High Energy Physics, 2023
We revisit moduli stabilization on Calabi-Yau manifolds with a discrete symmetry. Invariant fluxes allow for a truncation to a symmetric locus in complex structure moduli space and hence drastically reduce the moduli stabilization problem in its ...
Severin Lüst, Max Wiesner
doaj   +1 more source

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