Results 151 to 160 of about 18,204 (186)

COLUMBUS─An Efficient and General Program Package for Ground and Excited State Computations Including Spin-Orbit Couplings and Dynamics. [PDF]

open access: yesJ Phys Chem A
Plasser F   +35 more
europepmc   +1 more source

Almost hermitian manifolds and Osserman condition

Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg, 2001
The aim of this work is to extend a previous result of \textit{Q.-S. Chi} [J. Differ. Geom. 28, 187-202 (1988; Zbl 0654.53053)] which shows that Osserman Kähler manifolds are complex space forms provided that the holomorphic sectional curvature is nonpositive or nonnegative.
Blažić, N., Prvanović, M.
openaire   +1 more source

Homogeneous almost quaternion-hermitian manifolds

2012
An almost quaternion-Hermitian structure on a Riemannian manifold (M4n; g) is a reduction of the structure group of M to Sp(n)Sp(1) SO(4n). In this paper we show that a compact simply connected homogeneous almost quaternion-Hermitian manifold of non-vanishing Euler characteristic is either a Wolf space, or S2 S2, or the complex quadric SO(7)=U(3).
Moroianu, Andrei   +2 more
openaire   +3 more sources

The Dirichlet Problem on Almost Hermitian Manifolds

The Journal of Geometric Analysis, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chang Li, Tao Zheng
openaire   +1 more source

ALMOST EINSTEIN-HERMITIAN MANIFOLDS

JP Journal of Geometry and Topology
In this paper, we show that every almost Einstein-Hermitian 4-manifold (i.e., almost Hermitian 4-manifold with -invariant Ricci tensor and harmonic Weyl tensor) is either Einstein or Hermitian. Consequently, we obtain that any almost Einstein-Hermitian 4-manifold which is not Einstein must be Hermitian and that every almost Einstein-Hermitian 4 ...
openaire   +2 more sources

Isometric Immersions of almost Hermitian Manifolds

Canadian Journal of Mathematics, 1969
The Lefschetz theorem on hyperplane sections, as proved by Andreotti and Frankel (1), depends upon the following result.THEOREM. If M is a non-singular affine algebraic variety of real dimension 2k of complex n-space, thenThis theorem, which is interesting in itself, has been strengthened by Milnor (7), who showed that M has the homotopy type of a k ...
openaire   +2 more sources

J-harmonic functions on almost Hermitian manifolds

Differential Geometry and its Applications, 2020
The purpose of this paper is to examine the \(J\)-Laplacian operator \(\Delta_J=\mathrm{div} J \nabla\) acting on smooth functions on an almost Hermitian manifold \((M,J,g)\). Let \(\omega(X,Y)=g(JX,Y)\) be a fundamental 2-form for an almost Hermitian structure. An almost Hermitian manifold is called almost-Kähler if \(d\omega=0\) and it is called semi-
openaire   +1 more source

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