Abstract:We introduce a new method with spectral accuracy to solve linear non-autonomous ordinary differential equations (ODEs) of the kind d dt ũ(t) = f (t)ũ(t), ũ(−1) = 1, with f (t) an analytic function. The method is based on a new expression for the solution ũ(t) given in terms of a convolution-like operation, the ⋆-product. This expression is represented in a finite Legendre polynomial basis translating the initial problem into a matrix problem. An efficient procedure is proposed to approximate the Legendre coeff… Show more
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