Let ????????n be the semigroup of order-preserving partial transformations on an n-chain. We establish several results for the number F(n,m) of elements of ????????n with m fixed points, including recurrence… Click to show full abstract
Let ????????n be the semigroup of order-preserving partial transformations on an n-chain. We establish several results for the number F(n,m) of elements of ????????n with m fixed points, including recurrence r...
               
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