On solutions to systems of functional equations of multiple-valued logic

The solutions to systems of functional equations of multiple-valued logic was reported. The study considered general issues concerning solutions to systems of functional equations like the dependence of solutions of functional constants and the possibility of constructing systems of equations with a given unique solution or a given solution set. It was observed that for any function g ∈Q, there existed a system of functional equation over Q with one functional variable for which g was a unique solution. It was also observed in the study that there was a system of functional equations with a unique functional constant. Equations with a single one-place functional variable were also studied with all the operations of the Boolean algebra.