Harald Hanche-Olsen


Position and contact information
Associate professor emeritus at the Department of Mathematical Sciences.
I no longer teach, and do not advice students
I share an office with a handful of emeritus professors at room 1129, but you will only find me there sporadically.
Email: harald.hanche-olsen@ntnu.no.
– See also my official home page.
Fields of scientific interest:
Conservation laws and nonlinear partial differential equations
Functional analysis
Mathematical modelling
Stochastic analysis
Jordan operator algebras (no activity for decades)
Jordan operator algebras by Harald Hanche-Olsen and Erling Størmer (Pitman 1984) is available as a free download.
Proceedings volume: Non-Linear Partial Differential Equations, Mathematical Physics, and Stochastic Analysis – The Helge Holden anniversary volume. Editors: Fritz Gesztesy, HH-O, Espen R. Jakobsen, Yuri I. Lyubarskii, Nils Henrik Risebro, Kristian Seip (EMS 2018). I also did the copyediting and final typesetting for this book.
Some papers:
On the uniform convexity of Lp (arXiv/doi:10.1090/S0002-9939-06-08366-3)
With Marte Godvik: Existence of solutions for the Aw–Rascle traffic flow model with vacuum (preprint/doi:10.1142/S0219891608001428).
With Marte Godvik: Car-following and the macroscopic Aw–Rascle traffic flow model (preprint/doi:10.3934/dcdsb.2010.13.279).
On Goursat's proof of Cauchy's integral theorem
With Helge Holden: The Kolmogorov–Riesz compactness theorem (arXiv/doi:10.1016/j.exmath.2010.03.001)
– Addendum to the above (arXiv/doi:10.1016/j.exmath.2015.12.003)
With Helge Holden and Eugenia Malinnikova: An improvement of the Kolmogorov-Riesz compactness theorem (arXiv)
With Martin Grötschel, Helge Holden and Michael P. Krystek: On angular measures in axiomatic Euclidean planar geometry (arXiv:2011.05779). This preprint is an opinion piece regarding the rôle of angular measure in SI, and thus perhaps of limited interest to mathematicians. It does, however, contain a concise summary of basic axiomatic geometry, in a modern form.