Characteristic plane
= Characteristic plane
A characteristic plane is a planar <characteristic hypersurface>. For $u_{zz}-m^2u_{xx}=0$, the planes $x\pm mz=\text{constant}$ carry the two travelling-wave families.
= Characteristic plane
A characteristic plane is a planar <characteristic hypersurface>. For $u_{zz}-m^2u_{xx}=0$, the planes $x\pm mz=\text{constant}$ carry the two travelling-wave families.