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Fredrik Johansson
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Elementary functions with zeros only at the positive integers

Does there exist a (meromorphic) elementary function $f(z)$ that is zero at all the positive integers $z = 1, 2, 3, \ldots$ and only at those points?

(I apologize if this problem is trivial.)

Edit: an elementary function can be written as a finite composition of constants, rational functions, exponentials and logarithms.

Fredrik Johansson
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