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SUBROUTINE DEM31 (NIN,NOUT)
C$ (DEM31 - Complex Surface)
C$ Demonstration for the representation of a function of a
C$ complex variable. The modulus of the function can be shown
C$ as a surface in three dimensions, but the phase is lost in
C$ the process. By showing contours of constant phase the
C$ lost information is regained, but it is hard to show
C$ contours on a surface already densely populated by linear
C$ arcs. By showing regions of different phase in different
C$ colors the information is presented in a readily
C$ perceivable form.
C$ (10-APR-82)