Best Approximation and Convergence Properties of Higher-Order Spline Approximations
J. AhlbergE. NilsonJ. Walsh
Indiana University Mathematics Journal
1965
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10.1512/iumj.1965.14.14017
10.1512/iumj.1965.14.14017
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Indiana Univ. Math. J. 14 (1965) 231 - 243
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