Operator-theoretic Borel-series zero conjecture
Operator-theoretic Borel-series zero conjecture
Let be distinct points in the open unit disk converging to . Let be a separable infinite-dimensional complex Hilbert space with orthonormal basis , and let be the bounded normal operator defined by . If is a bounded operator on such that is a rank-one orthoprojection, then the compression has infinite point spectrum. Operator-theoretic Borel-series zero conjecture. Under these hypotheses, the stated compression has infinitely many eigenvalues. The source says this is equivalent to the preceding Borel-series conjecture after normalization, while a later remark discusses possible relaxations; no resolution is given.
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Sources & referencesView supporting material
Primary source
Julius Borcea, “Equilibrium points of logarithmic potentials induced by positive charge distributions. I. Generalized de Bruijn-Springer relations”, arXiv:math/0601519 (2006).
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