Schmeisser's weighted generalization of Sendov's conjecture

From papers

Let FF be a complex polynomial of degree n2n\geq 2 with zeros z1,,znz_1,\dots,z_n, all satisfying zk1|z_k|\leq 1, and critical points w1,,wn1w_1,\dots,w_{n-1}. Let l1,,lnl_1,\dots,l_n be nonnegative weights satisfying

k=1nlk=1.\sum_{k=1}^n l_k=1.

Schmeisser's conjecture. For every such choice of weights,

min1jn1k=1nlkzkwj1.\min_{1\leq j\leq n-1}\left|\sum_{k=1}^n l_kz_k-w_j\right|\leq 1.

This generalizes Sendov's conjecture by replacing an individual zero with an arbitrary convex combination of the zeros; the paper gives no resolution.

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Sources & referencesView supporting material

Primary source

Teng Zhang, “A refinement of Pawlowski's result”, arXiv:2411.07105 (2025).

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