Deconvolution theorem

The author introduces the deconvolution theorem which was studied recently by the authors and proves its theoretical correctness. The theorem is very suitable to resolve the kind of deconvolution which includes one or many zeroes in the frequency domain. In general system, if two of inputting function, system function and outputting function are known, the other may be known certainly according to the deconvolution theorem and the convolution theorem. The theorem is of great importance to applied mathematics, experimental physics, signal analytical systems and some engineering applications