TY - JOUR T1 - A note on non-homogeneous hyperbolic operators with low-regularity coefficients Y1 - 2013 A1 - Ferruccio Colombini A1 - Francesco Fanelli AB -

In this paper we obtain an energy estimate for a complete strictly hyperbolic operator with second order coefficients satisfying a log-Zygmund-continuity condition with respect to $t$, uniformly with respect to $x$, and a log-Lipschitz-continuity condition with respect to $x$, uniformly with respect to $t$.

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