3 citations · 3 across the 4 of their papers we have counts for
4 papers · 1 filter
Analyticity for Singular Sums of Squares of Degenerate Vector Fields
David S. Tartakoff
In this paper we prove local analytic hypoellipticity for a degenerate sum of squares of complex vector fields generalizing those of Kohn in "Hypoellipticity and Loss of Derivative…
Analyticity and loss of derivatives
Makhlouf Derridj, David S. Tartakoff
We prove local real analytic hypoellipticity for a sum of squares of complex vector fields studied by J.J. Kohn in a paper to appear in the Annals of Mathematics entitled "Hypoelli…
Analytic Hypoellipticity for a Class of Sums of Squares of Vector Fields with Non-Symplectic Characteristic Variety
Antonio Bove, Makhlouf Derridj, David S. Tartakoff
The recent example of Hanges: in is analytic hypoelliptic in the sense of germs but not in the strong sense in any neighborhoo…
Local Real Analyticity of Solutions for sums of squares of non-linear vector fields
David S. Tartakoff, Luisa Zanghirati
We show that all smooth solutions of model non-linear sums of squares of vector fields are locally real analytic. A global result for more general operators is presented in a paper…