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Bohr-mollerup TheoremIn mathematical analysis, the Bohr-Mollerup theorem is named after the Danish mathematicians Harald Bohr and Johannes Mollerup, who proved it. The theorem characterizes the gamma function, defined for x > 0 by -
as the only function f on the interval x > 0 that simultaneously has the three properties - and
- and
- is a convex function.
That log f is convex is often expressed by saying that f is log-convex, i.e., a log-convex function is one whose logarithm is convex. External link Proof, at PlanetMath
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