Yes, the 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 for all positive integers n, as both are quantified by the formula n^n - n!
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Yes, the 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 for all positive integers n, as both are quantified by the formula n^n - n!
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