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Sep 11, 2021 at 19:05 history made wiki Post Made Community Wiki by Stefan Kohl
May 6, 2020 at 0:29 comment added skbmoore @GerryMyerson $\zeta(4)$ appears in Stefan-Boltzmann law, and most would agree a rational times a power of $\pi$ is a closed form. $\zeta(3)$ appears in the expected number of black body photons. I wouldn't consider the odd zetas as closed-form, although $\zeta(3)$ might be an exception, since it is provably irrational.
May 5, 2020 at 0:03 comment added Gerry Myerson The question asks for closed form expressions. Does $\zeta(3)$ count as a closed form?
May 4, 2020 at 21:16 history answered skbmoore CC BY-SA 4.0