@article{Chinni_2022, title={On the regularity of the solutions and of analytic vectors for “sums of squares”}, volume={13}, url={https://mathematicalanalysis.unibo.it/article/view/16159}, DOI={10.6092/issn.2240-2829/16159}, abstractNote={We present a brief survey on some recent results concerning the local and global regularity of the solutions for some classes/models of sums of squares of vector fields with real-valued real analytic coefficients of H"ormander type. Moreover we also illustrate a result concerning the microlocal Gevrey regularity of analytic vectors for operators sums of squares of vector fields with real-valued real analytic coefficients of H"ormander type, thus providing a microlocal version, in the analytic category, of a result due to M. Derridj.}, number={1}, journal={Bruno Pini Mathematical Analysis Seminar}, author={Chinni, Gregorio}, year={2022}, month={Jan.}, pages={90–108} }