LaGriT Example: Use PSETS and set Z(x,y) Surface To Max[Z(x,y)]

*--* LAGriT Example Input file
*--* Carl Gable

*--* gable -at- lanl -dot- gov
*--*
*--*
*--* Create two quad surface that cross and then use math
*--* functions to make the second surface z coordinate equal
*--* to the first surface z coordinate where the second surface
*--* is below the first surface.
*--*