Local Real Analyticity of Solutions for sums of squares of non-linear vector fields

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/99072We 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 by Makhlouf Derridj and the first author under the title "Global Analytic Hypoellipticity for a Class of Quasilinear Sums of Squares of Vector Fields".AMS-LaTeX, 10 ppAnalysis of PDEs35B65Local Real Analyticity of Solutions for sums of squares of non-linear vector fieldstext