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Operator $K$-Positivity Preserver

Functional Analysis 2026-05-27 v1

Abstract

We characterize positivity preserving maps T:B(H)hR[x1,,xn]B(H)hR[x1,,xn]T: B(\mathcal{H})_h \otimes \mathbb{R}[x_1, \dots, x_n] \to B(\mathcal{H})_h \otimes \mathbb{R}[x_1, \dots, x_n] on Rn\mathbb{R}^n and on compact sets KRnK \subseteq \mathbb{R}^n. This also characterizes local operator moment sequences and general operator moment sequences via positivity preserving maps.

Keywords

Cite

@article{arxiv.2605.27329,
  title  = {Operator $K$-Positivity Preserver},
  author = {Lars-Luca Langer},
  journal= {arXiv preprint arXiv:2605.27329},
  year   = {2026}
}

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11 pages