  The paper considers the representation of k-valued logical functions in the
class of disjunctive normal forms. Various classes of monotone functions of
k-valued logic are investigated. Theorems are proved on the coincidence of
reduced and shortest disjunctive nominal forms of k-valued functions. For a
certain class of k-valued monotone functions, we prove an estimate for the
number of functions in this class. we prove criteria for the absorption of
elementary conjunctions by a first-order neighborhood of disjunctive normal
forms of k-valued functions.
