Wed, 27 Mar 1996 18:48:50 +0100 paulson New mutilated checkerboard example
Wed, 27 Mar 1996 18:47:25 +0100 paulson Added Mutil to ex targets
Wed, 27 Mar 1996 18:46:42 +0100 paulson Now use _irrefl instead of _anti_refl
Wed, 27 Mar 1996 18:45:17 +0100 paulson Library changes for mutilated checkerboard
Tue, 26 Mar 1996 17:15:54 +0100 paulson Simplified proofs, esp. for new ZF_ss
Tue, 26 Mar 1996 16:54:09 +0100 paulson Moved some proofs to Cardinal.ML; simplified others
Tue, 26 Mar 1996 16:26:55 +0100 paulson Moved some proofs to FOL/IFOL.ML
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