English

"Goldfish'' equations for infinitely many particles

Mathematical Physics 2026-07-16 v1

Abstract

The ``goldfish'' equations, so named because of their striking beauty, are a system of NN nonlinear ODE's, where NN is an arbitrary integer. They can be solved exactly in a very simple manner, by transforming them to free motion using a transformation involving the transition from the set of {\em coefficients\/} of a polynomial to that of its {\em zeroes}. This paper aims to explore the possibility of extending this solution to the case in which NN is infinite. The main difficulty involves the transition from polynomials to entire functions. Another approach using non-standard analysis, is left to future work.

Cite

@article{arxiv.2607.15237,
  title  = {"Goldfish'' equations for infinitely many particles},
  author = {Francois Leyvraz},
  journal= {arXiv preprint arXiv:2607.15237},
  year   = {2026}
}

Comments

14 pages, 1 figure