“…Hence, numerical methods play an essential role in interpreting the behavior of their solutions. Different kind of methods are used in numerical solution of equations of mathematical physics (see, for example, [1,2,3,4,5,6,7,8,9,10,11]). In particular, Boyd in [5] discussed the Chebyshev and Fourier spectral methods and Furano in [7] explained the polynomial approximations of solving differential equations.…”