Idempotent generators in finite partial transformation semigroup
Long Wei-fang · Journal of Guizhou Normal University · 2007
Let Xn={1,2,...n},Pn is semigroup consisting of all partial transformations in Xn,the symmetric group of all permutations of Xn is denoted by Sn,SPn=Pn\Sn,I is a set of idempotents of having(n,n-1)-classes and(n-1,n-1)-classes,we shall show that