2 papers
math.HO2019
Ola Bratteli and his diagrams
Tone Bratteli, Trond Digernes, George Elliott +6
This article discusses the life and work of Professor Ola Bratteli (1946--2015). Family, fellow students, his advisor, colleagues and coworkers review aspects of his life and his o…
math.QA2004
Models for the irreducible representation of a Heisenberg group
T. Digernes, V. S. Varadarajan
In its most general formulation a quantum kinematical system is described by a Heisenberg group; the "configuration space" in this case corresponds to a maximal isotropic subgroup.…