Quantum mechanics and general relativity are the two pinnacles of 20th-century physics. In their respective fields, ...

Quantum mechanics remains a cornerstone of modern physics, providing a framework for understanding phenomena at the microscopic scale. At the heart of its formulation lies the concept of Hilbert ...

Research in Hilbert space operators and Berezin numbers constitutes a fertile arena in modern mathematical analysis, bridging abstract operator theory with practical applications in spectral theory ...

This is a preview. Log in through your library . Abstract We give an example, in the infinite dimensional separable Hilbert space, of a purely unrectifiable Borel set with finite nonzero one ...

This is a preview. Log in through your library . Abstract The theory of focal points and conjugate points is an important part of the study of problems in the calculus of variations and control theory ...