Sat, 14 Feb 2009 15:30:26 -0800 huffman add mult_delta lemmas; simplify some proofs
Sat, 14 Feb 2009 11:32:35 -0800 huffman fix spelling
Sat, 14 Feb 2009 11:11:30 -0800 huffman declare fps_nth as a typedef morphism; clean up instance proofs
Sat, 14 Feb 2009 11:10:35 -0800 huffman add lemma surj_from_nat
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