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Analogues of Harglotz-Zagier-Novikov function

Number Theory 2025-11-21 v2

Abstract

Recently, Choie and Kumar extensively studied the Herglotz-Zagier-Novikov function F(z;u,v)\mathfrak{F}(z;u,v), defined as \begin{align*} \mathfrak{F}(z;u,v) = \int_{0}^{1} \frac{\log(1-ut^z)}{v^{-1}-t} dt, \quad \textrm{for} \quad \mathfrak{Re}(z)>0. \end{align*} They obtained two-term, three-term and six-term functional equations for F(z;u,v)\mathfrak{F}(z;u,v) and also evaluated special values in terms of di-logarithmic functions. Motivated from their work, we study the following two integrals, \begin{align*} \mathfrak{F}(z;u,v,w) &=\int_{0}^1 \frac{\log(1-ut^z)\log(1-wt^z)}{v^{-1}-t}\text{d}t, \\ \mathfrak{F}_k(z;u,v) &= \int_{0}^{1} \frac{\log^k(1-ut^z)}{v^{-1}-t} \, \text{d}t, \end{align*} for Re(z)>0\mathfrak{Re}(z)>0 and kNk \in \mathbb{N}. For k=1k=1, the integral Fk(z;u,v)\mathfrak{F}_k(z;u,v) reduces to F(z;u,v)\mathfrak{F}(z;u,v). This allows us to recover the properties of F(z;u,v)\mathfrak{F}(z;u,v) by studying the properties of Fk(z;u,v)\mathfrak{F}_k(z;u,v). We evaluate special values of these two functions in terms of poly-logarithmic functions.

Keywords

Cite

@article{arxiv.2511.15149,
  title  = {Analogues of Harglotz-Zagier-Novikov function},
  author = {Diksha Rani Bansal and Bibekananda Maji and Pragya Singh},
  journal= {arXiv preprint arXiv:2511.15149},
  year   = {2025}
}

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28 pages