Intro The A Priori Estimate Standard Forms Microlocal Regularity Examples

Intro The A Priori Estimate Standard Forms Microlocal Regularity Examples Wave front set of solutions to sums of squares of vector fields Paolo Albano Universita di Bologna Paris, November 2010

• let


• then all


• poisson-treves stratification


• hormander's theorem


• fields forming


• vector fields


• theorem assume