Tue, 11 Nov 1997 11:16:18 +0100 Fixed spelling error
paulson [Tue, 11 Nov 1997 11:16:18 +0100] rev 4198
Fixed spelling error
Tue, 11 Nov 1997 11:15:51 +0100 Made some proofs more robust
paulson [Tue, 11 Nov 1997 11:15:51 +0100] rev 4197
Made some proofs more robust
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