Tue, 06 Jan 2009 09:18:02 -0800 huffman merged.
Tue, 06 Jan 2009 09:03:37 -0800 huffman make cont_proc handle eta-contracted terms
Tue, 06 Jan 2009 09:02:18 -0800 huffman implement is_closed_term using Term.loose_bvar
Mon, 05 Jan 2009 15:26:57 -0800 huffman use Thm.close_derivation instead of standard
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