Summary
Linear self-adjoint multipoint boundary value problems are investigated. The case of the homogeneous equation is shown to lead to spline solutions, which are then utilized to construct a Green's function for the case of homogeneous boundary conditions. An approximation scheme is described in terms of the eigen-functions of the inverse of the Green's operator and is shown to be optimal in the sense of then-widths of Kolmogorov. Convergence rates are given and generalizations to more general boundary value problems are discussed.
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Jerome, J.W. Linear self-adjoint multipoint boundary value problems and related approximation schemes. Numer. Math. 15, 433–449 (1970). https://doi.org/10.1007/BF02165513
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DOI: https://doi.org/10.1007/BF02165513