Thu, 20 May 2010 10:43:46 +0200 wenzelm explicit Command.Status.UNDEFINED -- avoid fragile/cumbersome treatment of Option[State];
Thu, 20 May 2010 10:31:20 +0200 wenzelm inverted "Freeze" to "Follow", which is the default;
Wed, 19 May 2010 21:18:02 +0200 wenzelm basic controls to freeze/update prover results;
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