acquittance In the onerous task of the completion of this thesis, it is a pleasure to record my deep sense of gratitude for ACADEMIC ASSISTANCE to Mr. U.B. jangam who has lured me into the General Theory of Relativity. to Dr. G. G.Asgekar, and Mr. Ibohal Singh, of the Department of Mathematics who kept their rich collection of reprints of research papers on Relativity at my disposal and for perusal of the manuscript, to Dr. K.L. Narayana, M. Inst. &„ (London), of the Department of Physics who enlightened me on the physical significance of certain mathematical concept, to Dr.A.B.P.Rao, Solapur College, Solapur, who has demonstrated tile exploitation of the null formalism, to Dr.S.M.Chitre, Tata Institute of Fundamental Research, Bombay who perused some of my research papers, to Dr. M.H.Gokhale, Indian institute of science, Bangalore for stimulating discussions on Relativistic Astrophysics. For OFFICIAL SANCTIONS I would liKe to thank Dr.B.R.Bhonsle, (former Head of the Department), ViceChancellor of Marathwada University, Aurangaoad who used his good offices for allotting a Research fellowship to me. and ■* Dr. R. K. Saxena, Prof . and Head of the Department of Mathematics, shivaji University, Kolhapur, who showed keen interest in the progress of my research. My appreciation for warm HOSPITALITY is due to Dr. J.K, Rao, Director of All India Winter School, who extended me an invitation to participate in the 'Winter School on Differential Geometry and Applications to Relativity* at Saurashtra University, Bhavnagar (December 30, 1978 to January 28, 1979), to Dr. A.R.Erasanna, physical Research Laboratory, Ahmedabad, Convener, Einstein Centenary symposium, for the exquisite facilities for interacting with a galaxy of famous contributors to Relativity - including Prof.Ezra Newman around whose formalism this thesis is designed. (From January 29 to February 3, 1979), to Dr. M, Nagaraj of Bangalore University and Prof. C.v. Vishveshwara of Raman Research Institute, Bangalore, Directors of the 9th General Relativity and Gravitation Symposium, who afforded me ample time for the presenta tion of my paper. (December 23-25, 1979). to Dr. T.M.Karade, Chairman, Einstein Centenary symposium, who generously provided me an opportunity to be acquainted with active research workers from U.s.A., Japan, Canada# Italy# Greece (February 17-20# 1980). PERSONAL Warm regards are due to Lieut. Col. S. S.Bhonsle# MLA# Saw ant wadi fat his exquisite encouragement# to Shri B.N. Katkar, S.P. K, Mahavidyalaya# Sawantwadi for his affectionate advise throughout my career as a student. TECHNICAL ASSISTANCE The intricate arabesque of the mathematical formulae needs a careful and deft handling and a commensurate dextrous typing of the thesis has been provided by Mr. V.M.Kumbhar# whom I thank heartily. Embellishments and a piquant get up of the thesis are due to the friendly counsel of Mr. K.G.Chacfco# Research Technician# Department of Zoology# whom I gratefully acknowledge. Prof. S.M#vaidya, Director# Computer Centre# Poona University# Poona# deserves special mention for giving me interesting lessons on computer Programming FORTRAN IV. ( From 1st May 1977 to 15th June 1977). •kick
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