Sat, 20 Jan 2001 00:35:35 +0100 wenzelm tuned;
Sat, 20 Jan 2001 00:35:10 +0100 wenzelm Ring_and_Field_Example;
Sat, 20 Jan 2001 00:34:46 +0100 wenzelm instance int :: ordered_ring moved to Ring_and_Field_Example, because
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