Introduction - If you have any usage issues, please Google them yourself
An important part of the functional theory involves the basic problem of the approximate representation of functions. Such problems often encountered in theoretical research and practical application of mathematics in search of a G function in a class of functions selected, it is known that the function f more approximate in some sense representation, and gives the representation f more using the G approximation error and produce. This is the function approximation problem. In function approximation, used to approximate the given function f more functions can have different choices; even if the function is selected, in this kind of function is used as the approximate representation of the function f more G is still the way to determine the approximate degree of every kind of G; the f more (error) can also have various meanings. Therefore, the formulation of the function approximation problem has various forms, and its content is very rich.