Abstract:
A method for calculating using blocks of the partial derivatives of the boolean function which are represented in algebraic form { a polynomial form, disjunctive normal form and conjunctive normal form is proposed. The method can be used success-
fully for functions which depend on a large number of variables (tens and hundreds). This method can be applied to solve many problems from di®erent areas such as: elaborating of encryption system with variable keys, some problems from discrete mathematics (systems isomorphism problem, problem of determining
of chromatic number in graphs ect.).