Introduzione
Abstract
The non-exsistence is proved of a factorization of a semigroup
 ,in the form
,in the form  where
 where  is a arbitrary semigroup and
 is a arbitrary semigroup and  is a zeroleft semigroup ( or
 is a zeroleft semigroup ( or  is a zeroright semigroup and
 is a zeroright semigroup and  is arbitrary). The only factorization by means of zerosemigroups is charachterized.
 is arbitrary). The only factorization by means of zerosemigroups is charachterized.DOI Code:
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