a1 Department of Physics, The University of Texas, Austin, Texas 78712
a2 Department of Physics, Southwestern University, Georgetown, Texas 78726
Three-dimensional plots of dispersion in a cold anisotropic plasma are presented. The ω(κ, θ) surfaces provide a clear picture of the behaviour of cold plasma waves as the direction of propagation is varied. The group velocity (dω/dκ) has a simple geometrical interpretation on the surfaces.
(Received July 05 1978)