摘要
Ⅰ. A PROBLEM Let f be in L’ whose Fourier transform (?) is defined as then (?) is a continuous function of the real variable ω. If there exists a positive number Ω such that (?) is zero outside [—Ω,Ω], then f is called an Ω band-limited function. If f is continuous besides the above conditions, we have the following inversion formula:
