There are many integral representations for ζ(3)
Some lesser known are for instance :
∫10x(1−x)sinπxdx=7ζ(3)π3
∫10li(x)3 (x−1)x3dx=ζ(3)4
∫π0x(π−x)csc(x) dx=7 ζ(3)
∫∞0tanh2(x)x2dx=14 ζ(3)π2
∫π20xlogtanxdx=78ζ(3)
ζ(2) also has many integral representations as does 1ζ(2) , although this probability is because 1π and 1π2 have many.
Well I suspect that because I know no simple integral expression for 1ζ(3).
My question is: is there some interesting integral ∗ whose result is simply 1ζ(3)?
Note
∗ Interesting integral means that things like
+∞∫0e−ζ(3) x dx=1ζ(3)
are not a good answer to my question.
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