The conjecture on monotonicity of the zeta-function expression F(s)F(s)

Let ζ(s)\zeta(s) denote the Riemann zeta function, and define

F(s)=2(s+1)(2s+21)ζ(s+2)2π2(2s1)ζ(s),1<s<.F(s)=2(s+1)(2^{s+2}-1)\zeta(s+2)-2\pi^2(2^s-1)\zeta(s),\qquad 1<s<\infty.

Monotonicity conjecture. The function F(s)F(s) is strictly increasing on (1,)(1,\infty). In particular, s=2s=2 is the unique zero of F(s)F(s).

The conjecture is motivated by the dependence on qq of h(1/2)h_\infty”(1/2) and would remove the extra quantities N(q)N(q) from the preceding convexity proposition if established.

Sources & referencesView supporting material

Primary source

Xianghong Chen and Hans Volkmer, “On transfer operators on the circle with trigonometric weights”, arXiv:1610.07658 (2016).

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