Estimate of derivatives of functions on the real line in Weil spaces

V.A. Kofanov (Oles Honchar Dnipropetrovsk National University),


We prove the inequality that estimates seminorm of Weil of the derivatives of the functions on the real line with the help of uniform norm of the functions and their derivatives. We also solve the corresponding problem of Kolmogorov.


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ISSN (Online): 2664-5009
ISSN (Print): 2664-4991