Minimum norm extremals in function spaces. With applications to classical and modern analysis. (English) Zbl 0307.41027

Lecture Notes in Mathematics. 479. Berlin-Heidelberg-New York: Springer-Verlag. VIII, 209 p. DM 23.00 (1975).


41A65 Abstract approximation theory (approximation in normed linear spaces and other abstract spaces)
41-02 Research exposition (monographs, survey articles) pertaining to approximations and expansions
41A50 Best approximation, Chebyshev systems
41A15 Spline approximation
49K99 Optimality conditions
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