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Mertens, Möbius & Summatory Bounds

RH controls how much the Möbius function can accumulate.

What this theme is

The Mertens function M(x) is the running sum of the Möbius function μ(n). Papers in this theme study the growth of M(x), the cancellation in μ(n), and the bounds that flow from — and into — the location of the zeta zeros.

Why it recurs

Möbius cancellation is the arithmetic face of RH: it expresses the same content as a statement about how randomly the primes are distributed. It keeps reappearing because it is concrete and computable, giving a tangible quantity to bound when the analytic machinery feels abstract.

Relevance to the Riemann Hypothesis

RH is equivalent to the bound M(x) = O(x1/2 + ε) for every ε > 0. Proving such square-root cancellation in the Möbius sum would be equivalent to the Hypothesis.