Original version
Quantum and Stochastic Mathematical Physics.. 2023, 187-215, DOI: https://doi.org/10.1007/978-3-031-14031-0_9
Abstract
I give a survey of Sergio Albeverio’s work in nonstandard analysis, covering applications to operator theory, stochastic analysis, Dirichlet forms, quantum mechanics, and quantum field theory, and making an attempt at putting his contributions into the historical context of what has happened in the field before and since.