Zobrazeno 1 - 10
of 41
pro vyhledávání: '"R. K. Nagaich"'
Publikováno v:
Journal of Mathematics, Vol 2013 (2013)
We study totally contact umbilical lightlike hypersurfaces of indefinite -manifolds and prove the nonexistence of totally contact umbilical lightlike hypersurface in indefinite -space form.
Externí odkaz:
https://doaj.org/article/01e4066b628040f9a317bbd39fcccd72
Publikováno v:
Advances in Mathematical Physics, Vol 2012 (2012)
We obtain the expressions for sectional curvature, holomorphic sectional curvature, and holomorphic bisectional curvature of a GCR-lightlike submanifold of an indefinite Kaehler manifold. We discuss the boundedness of holomorphic sectional curvature
Externí odkaz:
https://doaj.org/article/cb3ae85f1efe40399b8e11bf38152e97
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2012 (2012)
We define GCR-lightlike submanifolds of indefinite cosymplectic manifolds and give an example. Then, we study mixed geodesic GCR-lightlike submanifolds of indefinite cosymplectic manifolds and obtain some characterization theorems for a GCR-lightlike
Externí odkaz:
https://doaj.org/article/e809d34e9d2d4ff9bba2dc2a67174e56
Publikováno v:
Advances in Mathematical Physics, Vol 2011 (2011)
We study mixed geodesic GCR-lightlike submanifolds of indefinite Sasakian manifolds and obtain some necessary and sufficient conditions for a GCR-lightlike submanifold to be a GCR-lightlike product.
Externí odkaz:
https://doaj.org/article/ba023a8f0b0b4d98a5701910bf16cf13
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2011 (2011)
We have studied mixed foliate CR-lightlike submanifolds and CR-lightlike product of an indefinite Kaehler manifold and also obtained relationship between them. Mixed foliate CR-lightlike submanifold of indefinite complex space form has also been disc
Externí odkaz:
https://doaj.org/article/d78d9a4f6e4b48ef977cd6fcb4d808aa
Publikováno v:
International Journal of Mathematics and Mathematical Sciences, Vol 2007 (2007)
We obtain some basic results for Riemannian curvature tensor of (ε)-Sasakian manifolds and then establish equivalent relations among φ-sectional curvature, totally real sectional curvature, and totally real bisectional curvature for (ε)-Sasakian m
Externí odkaz:
https://doaj.org/article/a690bc66ff22423e9d49813ef3654473
Autor:
Anu Devgan, R. K. Nagaich
Publikováno v:
New Trends in Mathematical Sciences, Vol 6, Iss 4, Pp 87-95 (2018)
The aim of the present paper is to establish a criterion for an indefinite Sasaki-like almost contact manifold with B-metric to reduce to a space of φ-holomorphic sectional curvature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db2b226c8e7d8842c7b8c555c59b0bf6
https://ntmsci.com/ajaxtool/GetArticleByPublishedArticleId?PublishedArticleId=8482
https://ntmsci.com/ajaxtool/GetArticleByPublishedArticleId?PublishedArticleId=8482
Autor:
Anu Devgan, R. K. Nagaich
Publikováno v:
JP Journal of Geometry and Topology. 20:295-316
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86c393d9f8b74a420d81587a417494c1
https://doi.org/10.17654/gt020040295
https://doi.org/10.17654/gt020040295
Autor:
R. K. Nagaich, Anu Devgan
Publikováno v:
JOURNAL OF ADVANCES IN MATHEMATICS. 13:7286-7294
In the present paper, we study the geometry of totally contact umbilical radical transversal lightlike submanifolds and totally contact umbilical CR- submanifold of an indenite Sasaki-like almost contact manifold with B-metric. We nd the necessary an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58f19b288bdba22d35ce1dc7f28dda9d
https://doi.org/10.24297/jam.v13i4.6234
https://doi.org/10.24297/jam.v13i4.6234
Publikováno v:
Proceedings - Mathematical Sciences. 126:613-621
We prove that if an indefinite Kaehler manifold $\bar {M}$ with lightlike submanifolds satisfies the axioms of holomorphic 2r-spheres, axioms of holomorphic 2r-planes, axioms of transversal r-spheres and axioms of transversal r-planes, then it is an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90880106e3005aeea32a28a363661ba6
https://doi.org/10.1007/s12044-016-0300-9
https://doi.org/10.1007/s12044-016-0300-9