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SUBROUTINE DEM27 (NIN,NOUT) C$ (DEM27 - Shaded Contours of Gaussian Well) C$ Demonstration of the potential felt by two particles in a C$ gaussian well. The surface arises from the use of C$ hyperspherical harmonics in quantum mechanics. Here it is C$ used to illustrate a technique of shading alternate C$ contours in the X and Y directions. If colored inks and a C$ broad-point pen are available, reasonably acceptable C$ results can be obtained. C$ (10-APR-82)