Maxwell inequality for critical points and Voronoi cells

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Let Vα(xˉ)V_{\alpha}(\bar x) be the potential of a generic configuration of point charges of the same sign, and let aαja_{\alpha}^j denote the number of its critical points of index jj. Let ♯j\sharp^j denote the number of effective Voronoi cells of dimension jj in the configuration's Voronoi diagram. For an affine subspace LL generically intersecting that diagram, let aα,Lja_{\alpha,L}^j be the number of index-jj critical points of the restriction of Vα(xˉ)V_{\alpha}(\bar x) to LL, and let ♯Lj\sharp_L^j denote the number of Voronoi cells satisfying dim⁡(S∩L)=j\dim(S\cap L)=j that are effective with respect to LL. Maxwell inequality. For every α≥12\alpha\ge \frac{1}{2}, one has

aαj≤♯ja_{\alpha}^j\le \sharp^j

and

aα,Lj≤♯Lj.a_{\alpha,L}^j\le \sharp_L^j.

The theorem preceding the conjecture establishes the corresponding one-to-one correspondence for sufficiently large α\alpha; the conjecture asserts these upper bounds already for all α≥12\alpha\ge \frac{1}{2}, and its one-dimensional relative case is stated to remain open.

References

Primary source

Andrei Gabrielov, Dmitry Novikov and Boris Shapiro, “Mystery of point charges”, arXiv:math-ph/0409009 (2004).

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