Gabrielov–Novikov–Shapiro monotonicity conjecture for generalized electrostatic potentials

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Let A1,…,AnA_1,\ldots,A_n be point charges in generic position, and for p≥1p\geq 1 define

Vp(x)=∑i=1nζip∥x−Ai∥p.V_p(x)=\sum_{i=1}^n\frac{\zeta_i^p}{\lVert x-A_i\rVert^p}.

For j∈{0,1,2,3}j\in\{0,1,2,3\}, let #j\#_j denote the limiting number of index-jj equilibria of VpV_p for sufficiently large pp.

Gabrielov–Novikov–Shapiro conjecture. For nn unit point charges in generic position, and all p≥1p\geq 1, the number of index-jj equilibria of VpV_p is at most #j\#_j.

The conjecture expresses the expected non-decrease of the number of equilibria with pp. The paper states that it provides a counterexample, so this conjecture is refuted.

References

Primary source

Herbert Edelsbrunner, Christopher Fillmore and Gonçalo Oliveira, “Counting Equilibria of the Electrostatic Potential”, arXiv:2501.05315 (2025).

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