CERTAIN QUADRUPLE SERIES EQUATIONS INVOLVING LAGUERRE POLYNOMIALS
By Omkar Lal Shrivastava ^{1} and Kuldeep Narain ^{2} ^{1}Department of Mathematics Government Kamladevi Rathi Girls Postgraduate College, Rajnandgaon491441, Chhattisgarh, India Email: omkarlal@gmail.com ^{2}Department of Mathematics Kymore Science College, Kymore483880, Madhya Pradesh, India Email: kuldeepnarain2009@gmail.com (Received : November 30, 2020 ; Revised: December 24, 2020)
Srivastava ([13], [15]) has solved dual series equations involving Batemank functions and Jacobi polynomials. Srivastava [16] has obtained more results for the Konhauserbiorhogonal set. Lowndes ([3], [4]), Srivastava [12], Lowndes and Srivastava [5], Srivastava[14], Srivastava and Panda [17] have obtained the solution of dual series equations involving Jacobi and Laguerre polynomials and also solved triple series equations involving Laguerre polynomials. Singh, Rokne and Dhaliwal [10] have find out the solution of triple series equations involving Laguerre polynomials in a closed form. Kuldeep Narain ([7], [8]), Rajnesh Krishnan Mudaliar and Kuldeep Narain [6] have solved Certain dual and quadruple series equations involving generalized Laguerre polynomials and Jacobi polynomials as kernels. In the present paper, an exact solution has been obtained for the quadruple series equations involving Laguerre polynomials by Noble [9] modified multiplying factor technique.
2010 Mathematics Subject Classifications: 45XX, 33C45, 33D45, 34BXX Keywords and phrases: Laguerre polynomials, Basic orthogonal polynomials and functions, Boundary value problems.

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