A Trace theorem for Martinet--type vector fields

Daniele Gerosa, Roberto Monti, Daniele Morbidelli

In ${\mathbb{R}}^3$ we consider the vector fields \[ X_1 =\frac{ \partial }{\partial x},\qquad X_2 =\frac{ \partial }{\partial y}+ |x|^α\frac{ \partial }{\partial z}, \] where $α\in\…