Elyasheev Leibtag

Elyasheev Leibtag

I am a postdoctoral researcher in mathematics at Ghent University, hosted by Tom De Medts. My position is supported by the FWO and F.R.S.–FNRS under the Excellence of Science (EOS) programme.

My research is in the geometry and dynamics of infinite groups. I study Lie groups and related groups, including Kac–Moody groups, with a particular interest in their actions on buildings. I also work on symbolic computation and its applications to number theory, including irrationality proofs using conservative matrix fields. I am interested in extending these methods to Feynman integrals in quantum field theory.

Previously, I was a postdoctoral fellow at the Technion, where I was part of the Ramanujan Machine team led by Ido Kaminer. I completed my PhD in Mathematics at the Weizmann Institute of Science, advised by Uri Bader. Before that, I studied Mathematics and Computer Science at the Hebrew University of Jerusalem.

CV

Papers and preprints

  • New Directions in Irrationality.
    Elyasheev Leibtag, Hila Barkan, Rotem Kalisch, Shachar Weinbaum, Michael Shalyt, Ido Kaminer
    [Code]
  • An Infinite Family of Apéry-like Recurrences for Euler’s Constant.
    Rotem Kalisch, Tali Monderer, Elyasheev Leibtag, Shachar Weinbaum, Michael Shalyt, Ido Kaminer
    [arXiv:2610.13919]
  • Selflessness, MIF and opposition in groups acting on exotic buildings.
    Corentin Le Bars, Elyasheev Leibtag, Itamar Vigdorovich
    [arXiv:2609.17129]
  • The Ramanujan Challenge for AI.
    Ramanujan Machine Group
    [arXiv:2607.09721]
  • On Conservative Matrix Fields: Continuous Asymptotics and Arithmetic.
    Shachar Weinbaum, Elyasheev Leibtag, Rotem Kalisch, Michael Shalyt, Ido Kaminer
    [arXiv:2507.08138]
  • From Euler to AI: Unifying Formulas for Mathematical Constants.
    Tomer Raz, Michael Shalyt, Elyasheev Leibtag, Rotem Kalisch, Shachar Weinbaum, Yaron Hadad, Ido Kaminer
    [NeurIPS 2025] [arXiv:2502.17533]
  • Semi-group compactifications of Algebraic Groups.
    Elyasheev Leibtag
    [arXiv:2404.09878]
  • Homomorphic images of algebraic groups.
    Uri Bader, Elyasheev Leibtag
    [Journal of Algebra]
    (special volume in honor of Jacques Tits)