3 papers
math.AP2020
Some remarks on maximal rank
Tove Dahn
We argue that the spiral can, in presence of a maximum principle, be of maximal rank at a boundary, but does not preserve hypoellipticity.
math.AP2019
Some remarks on polar sets to sums of squares
Tove Dahn
We argue that a necessary condition for hypoellipticity is that the polar is not a spiral domain.
math.DS2014
Some remarks on prediction models
Tove Dahn
This article is a discussion of some characteristic properties in connection with global models, particularly for the application of prediction, such as the approximation property,…