Skip to main content
2 events
when toggle format what by license comment
Nov 6, 2015 at 8:11 comment added Jochen Wengenroth This seems to be a difficult question. You certainly know the Lojasiewicz-Hörmander theorem that multiplication with a polynomial (or analytic function) defines a closed range operator. This is already very deep. For constant coefficient differential operators you can use Fourier transformation but the general case seems to be far out of reach.
Nov 5, 2015 at 4:36 history asked Pea CC BY-SA 3.0