Monday, July 20, 2026

If a function f in set A = {1,2,3,.......n} is ONTO then , it is ONE - ONE too?

 


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Is the number of all INTO functions from the set {1, 2, 3, ..... n} to itself equal to all number of MANY to ONE fuctions?

Yes,  t he number of all into functions from the set {1, 2, 3, .... n} to itself is exactly equal to the number of many-to-one functions ...