Results 71 to 80 of about 438,929 (192)
Global eigenfamilies on closed manifolds
Journal of the London Mathematical Society, Volume 112, Issue 2, August 2025.Abstract We study globally defined (λ,μ)$(\lambda,\mu)$‐eigenfamilies on closed Riemannian manifolds. Among others, we provide (non‐)existence results for such eigenfamilies, examine topological consequences of the existence of eigenfamilies and classify (λ,μ)$(\lambda,\mu)$‐eigenfamilies on flat tori. It is further shown that for f=f1+if2$f=f_1+i f_2$
Oskar Riedler, Anna Siffert
wiley +1 more source
CR-LIGHTLIKE SUBMANIFOLDS OF INDEFINITE PARA- SASAKIAN MANIFOLD [PDF]
, 2017 The purpose of this paper is to study a totally contact umbilical contact CR-lightlike submanifolds of an indefinite para-Sasakian manifold. In this paper, we prove that a totally contact umbilical CR-lightlike submanifold is totally contact geodesic ...
Pandey, Shashikant, Prasad, Rajendra
core
PSEUDO-SLANT SUBMANIFOLD IN KENMOTSU SPACE FORMS [PDF]
, 2016 In this paper, we study geometry of the pseudo-slant submanifold of a Kenmotsu space form. Necessary and suffcient conditions are given for a submanifold to be a pseudo-slant submanifold in Kenmotsu manifolds.
Atceken, Mehmet +2 more
core +1 more source
CR-hypersurfaces of the six-dimensional sphere
International Journal of Mathematics and Mathematical Sciences, 1994 We proved that there does not exist a proper CR-hypersurface of S6 with parallel second fundamental form. As a result of this we showed that S6 does not admit a proper CR-totally umbilical hypersurface.
M. A. Bashir
doaj +1 more source
Journal of the London Mathematical Society, Volume 111, Issue 5, May 2025.Abstract Using iterated uniform local completion, we introduce a notion of continuous CR$CR$ functions on locally closed subsets of reduced complex spaces, generalising both holomorphic functions and CR$CR$ functions on CR$CR$ submanifolds. Under additional assumptions of set‐theoretical weak pseudo‐concavity, we prove optimal maximum modulus ...
Mauro Nacinovich, Egmont Porten
wiley +1 more source
Nondensity results in high‐dimensional stable Hamiltonian topology
Journal of the London Mathematical Society, Volume 111, Issue 4, April 2025.Abstract We push forward the study of higher dimensional stable Hamiltonian topology by establishing two nondensity results. First, we prove that stable hypersurfaces are not C3$C^3$‐dense in any isotopy class of embedded hypersurfaces on any ambient symplectic manifold of dimension 2n⩾8$2n\geqslant 8$.
Robert Cardona, Fabio Gironella
wiley +1 more source
Effects of the alloy composition on phase constitution and properties of laser deposited Ni-Cr-B-Si coatings [PDF]
, 2013 Three Ni-Cr-B-Si hardfacing alloy powders with different Cr contents and Si to B ratios were deposited at cladding speeds of 5-40 mm/s on steel substrate using laser beam and the alloy composition-phase formation-properties relationships in the deposits ...
Ocelík, V.; id_orcid +6 more
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Lipschitz decompositions of domains with bilaterally flat boundaries
Journal of the London Mathematical Society, Volume 111, Issue 3, March 2025.Abstract We study classes of domains in Rd+1,d⩾2$\mathbb {R}^{d+1},\ d \geqslant 2$ with sufficiently flat boundaries that admit a decomposition or covering of bounded overlap by Lipschitz graph domains with controlled total surface area. This study is motivated by the following result proved by Peter Jones as a piece of his proof of the Analyst's ...
Jared Krandel
wiley +1 more source
© Hindawi Publishing Corp. SKEW-SYMMETRIC VECTOR FIELDS ON A CR-SUBMANIFOLD OF A PARA-KÄHLERIAN MANIFOLD [PDF]
, 2003 We deal with a CR-submanifold M of a para-Kählerian manifold M ̃ , which carries a J-skew-symmetric vector field X. It is shown that X defines a global Hamiltonian of the symplectic form Ω onM and JX is a relative infinitesimal automorphism of Ω.
Radu Rosca, Adela Mihai
core
CR-hypersurfaces in a space with a pseudoconformal connection [PDF]
, 1983 In this paper we study a submanifold in a space with a pseudoconformal connection. We assume that the submanifold M M is so situated that it inherits the structure of a CR {\text {CR}} -hypersurface from the
Michael J. Markowitz
core +1 more source