Narlikar, J. V.2012-03-312012-03-312010-11-27http://hdl.handle.net/11007/1685enCalcutta SchoolBanaras SchoolVaidya SolutionRaychaudhuri equationNaked singularitiesBlack hole astrophysicsWhite holesGravitational lensesGravitational wavesGR-AP infrastructure in IndiaArticle