SUBDIRECT SUM OF SUBTRACTION ALGEBRAS
SUBDIRECT SUM OF SUBTRACTION ALGEBRAS
Abstract. Subdirect sum of algebras are introduced,and related properties are investigated. 1. IntroductionB. M. Schein [9] considered systems of the form ('; –;n ), where ' isa set of functions closed under the composition – of functions (andhence ('; – ) is a function semigroup) and the set theoretic subtraction …