No implementation found for style `ifthen'

The greg.aux file was not found, so sections will not be numbered 
and cross-references will be shown as icons.

No number for "TheX-Windowgraphicwindowjustbeforeclearingtheplotinthedemonstrationprocedure."

No number for "Theprintedoutputofthesimpledemonstrationprocedure."

No number for "AnexampleofbitmapdisplayinGreG."
