Spectral projections of hypoelliptic operators (Q1175474)

The paper deals with the asymptotic behavior (for \(\lambda\to\infty)\) of spectral projectors \(E_ \lambda\) of positive symmetric differential operators of \(2m\)-th order in the space \(L_ 2(\Omega,H)\), where \(H\) is a separable Hilbert space and \(\Omega\subset\mathbb{R}^ n\) is an open set.