Expansion of the polynomial Set Sn(x1, x2, x3) in terms of Jacobi polynomials

In the present paper, an effort has been made to give Expansion of The Polynomial Set Sn(x1, x2, x3) in Terms Jacobi Polynomials. Many interesting new results may be obtained on specializing respective parameters which some them are believed new.AMS Subject Classification: 33c.