Basc: constrained approximation by semidefinite programming
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The authors 2016. This article details the theoretical grounds for a semidefinite-programming-based method that computes best approximants by splines under some general constraints and relative to several function norms, notably the max-norm. The method has been implemented as a matlab package called Basc (Best Approximations by Splines under Constraints), which relies on the two external packages Chebfun and CVX.