Thu, 02 Mar 2000 10:26:22 +0100 tidied the proofs of singleton_insert_inj_eq, singleton_insert_inj_eq' and
paulson [Thu, 02 Mar 2000 10:26:22 +0100] rev 8326
tidied the proofs of singleton_insert_inj_eq, singleton_insert_inj_eq' and installed them by AddIffs, since they are an important special case of equalityE.
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