65 years of professor Milan Mikan

EDITORIAL 65 th Birthday of Professor Hauptmann

On Three-dimensional Lorentzian -sasakian Manifolds (dedicated in Occasion of the 65-years of Professor

The object of the present paper is to study three-dimensional Lorentzian -Sasakian manifolds which are Ricci-semisymmetry, locally symmetric and have -parallel Ricci tensor. An example of a three-dimensional Lorentzian -Sasakian manifold is given which verifies all the Theorems.

On Generalized -recurrent Sasakian Manifolds (dedicated in Occasion of the 65-years of Professor

The object of the present paper is to study generalized -recurrent Sasakian manifolds. Here it is proved that a generalized -recurrent Sasakian manifold is an Einstein manifold. We also find a relation between the associated 1-forms A and B for a generalized -recurrent and generalized concircular -recurrent Sasakian manifolds. Finally, we proved that a three dimensional locally generalized -rec...

SOME RESULTS ON (LCS)2n+1-MANIFOLDS (DEDICATED IN OCCASION OF THE 65-YEARS OF PROFESSOR

In this paper we study Lorentzian Concircular Structure manifolds (briefly (LCS)2n+1-manifold ) and obtain some interesting results.

A Study on Absolute Factors for a Triangular Matrix (dedicated in Occasion of the 65-years of Professor

In this paper a result concerning summability factors theorem for lower triangular matrices is presented. This result generalized and extend the result of Savas [1].