Research Interest: Special function: gamma, beta, digamma and polygamma, Riemann zeta and Hurwitz zeta, hypergeometric functions and integrals, Appell functions, Lauricella functions, elliptic functions and integrals. Closed form evaluation of definite integrals. Exact solutions of ordinary differential equations and boundary value problems by means of Lie symmetries. Mathematical modeling with ordinary differential equations. Economic order quantity models for inventory optimization, minimum cost model in production planning or other management models