An optimal numerical method for a singularly perturbed boundary value problem with a small parameter multiplying the higher order derivative.
Computational Mathematics and Mathematical Physics, 43, (2), .
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A method for solving a class of one-dimensional boundary value problems for the reaction–diffusion equation with a small parameter multiplying the higher order derivative is proposed. The method is optimal in the sense that its approximation error is equal (up to a constant) to the lower esti-
mate of the n-width of the compact set consisting of weak (generalized) solutions to problems in the
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