Chebyshev approximation by exponentials on finite subsets
Dietrich Braess · Mathematics of Computation · 1973
This paper is concerned with Chebyshev approximation by exponentials on finite subsets. We take into account that varisolvency does not hold for exponentials in general. A bound for the derivatives of exponentials is established and convergence of the solutions for the discrete problems is proved in the topology of compact convergence on the open interval.