Results 31 to 40 of about 1,270 (170)
On the Efficient Implementation of Sparse Bayesian Learning-Based STAP Algorithms
Remote Sensing, 2022 Sparse Bayesian learning-based space–time adaptive processing (SBL-STAP) algorithms can achieve superior clutter suppression performance with limited training sample support in practical heterogeneous and non-stationary clutter environments.
Kun Liu +4 more
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Harmonic Almost Hermitian Structures [PDF]
, 2017 To appear in the Proceedings of the INdAM workshop "New perspectives in differential geometry: special metrics and quaternionic geometry" on the occasion of the sixtieth birthday of Simon Salamon, Rome, November, 16-20 ...
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Skew Constacyclic Codes over a Non-Chain Ring
Entropy, 2023 In this paper, we investigate the algebraic structure of the non-local ring Rq=Fq[v]/⟨v2+1⟩ and identify the automorphisms of this ring to study the algebraic structure of the skew constacyclic codes and their duals over this ring. Furthermore, we give a
Mehmet Emin Köroğlu, Mustafa Sarı
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Almost Complex and Hypercomplex Norden Structures Induced by Natural Riemann Extensions
Mathematics, 2022 The Riemann extension, introduced by E. K. Patterson and A. G. Walker, is a semi-Riemannian metric with a neutral signature on the cotangent bundle T∗M of a smooth manifold M, induced by a symmetric linear connection ∇ on M.
Cornelia-Livia Bejan, Galia Nakova
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A note about almost contact metric hypersurfaces axioms for almost Hermitian manifolds
Дифференциальная геометрия многообразий фигурFrom 1950s, it is known that an almost contact metric structure is induced on an arbitrary oriented hypersurface in an almost Hermitian manifold. In accordance with the definition, an almost Hermitian manifold satisfies the axiom of almost contact ...
A. Abu-Saleem +2 more
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Дифференциальная геометрия многообразий фигур, 2019 Almost contact metric (аст-)structures induced on oriented hypersurfaces of a Kählerian manifold are considered in the case when these аст-structures are of cosymplectic type, i. e. the contact form of these structures is closed. As it is known, the
G. Banaru
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Hermitian structures on a class of almost nilpotent solvmanifolds
Journal of Algebra, 2022 In this paper we investigate the existence of invariant SKT, balanced and generalized Kähler structures on compact quotients $Γ\backslash G$, where $G$ is an almost nilpotent Lie group whose nilradical has one-dimensional commutator and $Γ$ is a lattice of $G$. We first obtain a characterization of Hermitian almost nilpotent Lie algebras $\mathfrak{g}$
Anna Fino, Fabio Paradiso
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Generalised kinematics for double field theory
Journal of High Energy Physics, 2017 We formulate a kinematical extension of Double Field Theory on a 2d-dimensional para-Hermitian manifold Pηω $$ \left(\mathcal{P},\eta, \omega \right) $$ where the O(d, d) metric η is supplemented by an almost symplectic two-form ω.
Laurent Freidel +2 more
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Almost hermitian structures with parallel torsion
Journal of Geometry and Physics, 2007 The characteristic connection of an almost hermitian structure is a hermitian connection with totally skew-symmetric torsion. The case of parallel torsion in dimension six is of particular interest. In this work, we give a full classification of the algebraic types of the torsion form, and, based on this, undertake a systematic investigation into the ...
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Invariant almost Hermitian structures on flag manifolds
Advances in Mathematics, 2003 Let \(\mathfrak g\) be a complex semi-simple Lie algebra of a complex Lie group \(G\), and let \(\mathbb{F}=G/P\) be a maximal flag manifold of \(G\), where \(P\) is a minimal parabolic (Borel) subgroup. For any maximal compact subgroup \(U\) of \(G\) the manifold \(\mathbb{F}\) can be written as \(\mathbb{F}=U/T\), where \(T\subset U\) is a maximal ...
San Martin, Luiz A.B. +1 more
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