A remark on the semiclassical Fefferman-Phong inequality for certain systems of PDEs
Summary: We give here an extension of the semiclassical version of the Fefferman-Phong inequality to certain \(N\times N\) systems of PDEs. In addition, we give an example of system for which the semiclassical Fefferman-Phong inequality cannot hold.
systems of partial differential operators
scientific article; zbMATH DE number 5787948