International Journal of Engineering and Information Systems (IJEAIS)

Title: An approximation of Complicated Functions

Authors: Rehab Amer Kamel and Mayada Ali Kareem

Volume: 9

Issue: 7

Pages: 1-4

Publication Date: 2025/07/28

Abstract:
In this review the functions and their relationship to the best approximation, which gives us a correct judgment on the smoothness of functions and how to find their derivatives and their importance in solving many scientific problems in partial differential equations and the theory of approximation are offered . The most important theories are studied such as Ditzian-Totik, the direct and inverse theory in approximation, etc., especially the difficult wave functions.

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