On a transformation of the Finsler metric
B. N. Prasad, H. S. Shukla, D. D. Singh (1990)
Matematički Vesnik
Bácsó, Sándor, Szilágyi, Brigitta (2002)
Mathematica Pannonica
Pirdal, A.Z., Gungor, M.A., Tosun, M. (2009)
Acta Universitatis Apulensis. Mathematics - Informatics
Matveev, Vladimir S. (2009)
Balkan Journal of Geometry and its Applications (BJGA)
Piotr Dacko, Zbigniew Olszak (2005)
Banach Center Publications
An almost cosymplectic (κ,μ,ν)-space is by definition an almost cosymplectic manifold whose structure tensor fields φ, ξ, η, g satisfy a certain special curvature condition (see formula (eq1b)). This condition is invariant with respect to the so-called -homothetic transformations of almost cosymplectic structures. For such manifolds, the tensor fields φ, h (), A ( = -∇ξ) fulfill a certain system of differential equations. It is proved that the leaves of the canonical foliation of an almost cosymplectic...
Sobchuk, V.S., Mikeš, J., Pokorna, O. (1999)
Novi Sad Journal of Mathematics
C. P. Awasthi (1976)
Publications de l'Institut Mathématique
C.P. Awasthi (1976)
Publications de l'Institut Mathématique [Elektronische Ressource]
Uday Chand De, Avik De (2012)
Czechoslovak Mathematical Journal
The object of the present paper is to study almost pseudo-conformally symmetric Ricci-recurrent manifolds. The existence of almost pseudo-conformally symmetric Ricci-recurrent manifolds has been proved by an explicit example. Some geometric properties have been studied. Among others we prove that in such a manifold the vector field corresponding to the 1-form of recurrence is irrotational and the integral curves of the vector field are geodesic. We also study some global properties of such a...
Khan, Quddus (2006)
Novi Sad Journal of Mathematics
Franki Dillen, Johan Fastenakels (2009)
Open Mathematics
We show that a Lagrangian submanifold of a complex space form attaining equality in the inequality obtained by Oprea in [8], must be totally geodesic.
P. G. Walczak (1984)
Annales Polonici Mathematici
Anton Dekrét (1972)
Czechoslovak Mathematical Journal
K. Duggal (2007)
Open Mathematics
In this paper we study two classes of lightlike submanifolds of codimension two of semi-Riemannian manifolds, according as their radical subspaces are 1-dimensional or 2-dimensional. For a large variety of both these classes, we prove the existence of integrable canonical screen distributions subject to some reasonable geometric conditions and support the results through examples.
Cabrerizo, José L., Fernández, Luis M., Fernández, Manuel (1993)
Portugaliae mathematica
B. B. Sinha, A.S. Matharoo (1986)
Publications de l'Institut Mathématique
Ryszard Deszcz, Wiesław Grycak (1990)
Colloquium Mathematicae
Włodzimierz Jelonek (2007)
Colloquium Mathematicae
We study four-dimensional almost Kähler manifolds (M,g,J) which admit an opposite almost Kähler structure.
Etayo, Fernando, Rosca, Radu, Santamaría, Rafael (1998)
Balkan Journal of Geometry and its Applications (BJGA)
A. Derdziński (1977)
Colloquium Mathematicae