Abstract
Taking $t$ at random, uniformly from $[0,T ] $, we consider the $k$th moment, with respect to $t$, of the random variable corresponding to the $2\beta$th moment of $\zeta(1/2+ix)$ over the interval $x\in(t, t+1 ] $, where $\zeta(s)$ is the Riemann zeta function. We call these the `moments of moments' of the Riemann zeta function, and present a conjecture for their asymptotics, when $T\to\infty$, for integer $k,\beta$. This is motivated by comparisons with results for the moments of moments of the characteristic polynomials of random unitary matrices and is shown to follow from a conjecture for the shifted moments of $\zeta(s)$ due to Conrey, Farmer, Keating, Rubinstein, and Snaith~\cite{cfkrs2}. Specifically, we prove that a function which, the shifted-moment conjecture of~\cite{cfkrs2} implies, is a close approximation to the moments of moments of the zeta function does satisfy the asymptotic formula that we conjecture. We motivate as well similar conjectures for the moments of moments for other families of primitive $L$-functions.
Original language | English |
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Pages (from-to) | 79-100 |
Number of pages | 22 |
Journal | Journal of Number Theory |
Volume | 223 |
Early online date | 14 Jan 2021 |
DOIs | |
Publication status | Published - 1 Jun 2021 |
Bibliographical note
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