Calculation of the Rademacher-Walsh spectrum from a reduced representation of Boolean functions

A theory has been developed to calculate the Rademacher-Walsh transform from a reduced representation (disjoint cubes) of incompletely specified Boolean functions. The transform algorithm makes use of the properties of an array of disjoint cubes and allows the determination of the spectral coefficients in an independent way. The program for the algorithms uses advantages of C language to speed up the execution. The comparison of different versions of the algorithm has been carried out. The algorithm successfully overcomes all drawbacks in the calculation of the transform from the design automation system based on spectral methods.<>