doc-src/Tutorial/ToyList/qed
author paulson
Tue, 06 Jan 2004 10:40:15 +0100
changeset 14341 a09441bd4f1e
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Ring_and_Field now requires axiom add_left_imp_eq for semirings. This allows more theorems to be proved for semirings, but requires a redundant axiom to be proved for rings, etc.

qed "rev_rev";