%0 DATA
%A Claudia, Garetto
%A Michael, Ruzhansky
%D 2015
%T A note on weakly hyperbolic equations with analytic principal part
%U https://repository.lboro.ac.uk/articles/A_note_on_weakly_hyperbolic_equations_with_analytic_principal_part/9387440
%2 https://repository.lboro.ac.uk/ndownloader/files/17000651
%K Hyperbolic equations
%K Well-posedness
%X In this note we show how to include low order terms in the C∞ well-posedness results for weakly hyperbolic equations with analytic time-dependent coefficients. This is achieved by doing a different reduction to a system from the previously used one. We find the Levi conditions such that the C∞ well-posedness continues to hold.