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math.FA2016
A note on the equioscillation theorem for best ridge function approximation
Vugar Ismailov
We consider the approximation of a continuous function, defined on a compact set of the -dimensional Euclidean space, by sums of two ridge functions. We obtain a necessary and s…
math.FA2016
On the Diliberto-Straus algorithm for the uniform approximation by a sum of two algebras
Aida Kh. Asgarova, Vugar E. Ismailov
In 1951, Diliberto and Straus proposed a levelling algorithm for the uniform approximation of a bivariate function, defined on a rectangle with sides parallel to the coordinate axe…