An improved explicit estimate for $ζ(1/2+it)$

An explicit subconvex bound for the Riemann zeta function $ζ(s)$ on the critical line $s=1/2+it$ is proved. Previous subconvex bounds relied on an incorrect version of the Kusmin-Landau lemma. After accounting for the needed correction in that lemma, we recover and improve the record explicit bound for $|ζ(1/2 + it)|$.

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