Zia ur rehman ( F18A14G06058) creator text Faisalabad ( unpublished) 2020 monographic iv,41 p. ; 30 cm. Submitted in fulfillment of the requirements for the degree of Master of Philosophy in Mathematics faculty of Basic Sciences and Humanities. Thesis supervisor: Dr.Zulfiqar Ali Include bibliographical references Thesis (M.Phil)--Riphah International Univeristy, 2020 English Mathematics Group classification and exact solutions of partial differential equations Lie groups Gauge invariance Lie algebras Analytic functions FBSH 515 ZIA