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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. POMI, 2025 Volume 545, Pages 137–144 (Mi znsl7621)

Remark about a property of a projector onto a complemented subspace in a nuclear Köthe space

V. M. Kaplitskii

Institute of Mathematics, Mechanics and Computer Sciences, Southern Federal University, Rostov-on-Don

Abstract: The article shows that a continuous projector $P: E \rightarrow E$ in a nuclear Köthe space $E$ is similar to a projector $P'$ with the following property: the intersection of $P'(E)$ with the space of finite numerical sequences is dense in $P'(E)$.

Key words and phrases: Riemann zeta function, Riemann hypothesis, Montgomery's pair correlation conjecture, selfadjoint operators, finite-rank perturbations, compact perturbations, sine kernel determinantal process, Gaussian Unitary Ensemble (GUE), modified Bessel functions, Hilbert–Pólya operator, spectral theory, zeros of the zeta function.

UDC: 517.98

Received: 15.07.2025



© Steklov Math. Inst. of RAS, 2026