
doi: 10.1007/bf02252836
In this paper certain theorems establishing the existence of onesided directional derivative for some classes of functions are proved. These theorems are then applied to problems of best approximations.
Best approximation, Chebyshev systems, Numerical mathematical programming methods, Numerical methods in optimal control
Best approximation, Chebyshev systems, Numerical mathematical programming methods, Numerical methods in optimal control
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