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on 9/24/2024, WM supposed :
Whatever it means. I see that there are no unit fractions below 0 and many above 0. Therefore NUF increases. At no point it can increase by more than 1.The function NUF(0) increases. ∀n ∈ ℕ: 1/n - 1/(n+1) > 0 proves that it can gain only one unit fraction at any point x ∈ ℝ, hence NUF has to pass the value 1.It means "For all" and says nothing about starting somewhere, moving, and ending somewhere else.
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