Zagier-type conjecture on the 2-adic valuations of Taylor coefficients

Let m=2nm0m=2^n m_0, where m0m_0 is odd, and let u=u2 u= u_2 denote the 2-adic valuation. Let ama_m be the Taylor coefficients of the reciprocal Riemann mapping function. Zagier-type conjecture. For the ama_m coefficients, if n=0n=0, then

u(am)=u((2m2)!);- u(a_m)= u((2m-2)!);

if n=1n=1, then

u(am)=u(((2m2)/3)!)+ϵ(m0),- u(a_m)= u(((2m-2)/3)!)+\epsilon(m_0),

where ϵ(m0)=1\epsilon(m_0)=1 if m0≢3(mod12)m_0\not\equiv3\pmod{12}, while otherwise it follows the pattern in the cited table. This extends the conjectured valuation patterns for the Laurent coefficients bmb_m to the Taylor coefficients ama_m. The n=0n=0 identity agrees with the known equality case for odd mm; the n=1n=1 pattern, including its exceptional values, remains conjectural.

Sources & referencesView supporting material

Primary source

Filippo Beretta, Jesse Dimino, Weike Fang, Thomas C. Martinez, Steven J. Miller and Daniel Stoll, “On Benford's Law and the Coefficients of the Riemann Mapping Function for the Exterior of the Mandelbrot Set”, arXiv:2206.04112 (2023).

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