Measurement model with passive optical operations and photon-counting measurements. Credit: Physical Review Letters (2023). DOI: 10.1103/PhysRevLett.131.210201 A study published in the journal ...

We study and compare the gap and the Riesz topologies of the space of all unbounded regular operators on Hilbert C*-modules. We show that the space of all bounded adjointable operators on Hilbert ...

Proceedings of the American Mathematical Society, Vol. 32, No. 2 (Apr., 1972), pp. 484-490 (7 pages) In this paper is presented a theory of unbounded operators which admit spectral distributions. The ...

Operator algebras and functional analysis form a foundational framework in modern mathematics, interlinking abstract algebraic structures with analytic techniques to study infinite‐dimensional spaces.