isabelle: Graph

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moved lemmas to Nat.thy
2007-05-17, by krauss
added induction principles for induction "backwards": P (Suc n) ==> P n
2007-05-17, by krauss
added pointer to new Unification theory
2007-05-17, by krauss
Added unification case study (using new function package)
2007-05-17, by krauss
avoid using redundant lemmas from RealDef.thy
2007-05-17, by huffman
canonical prefixing of class constants
2007-05-17, by haftmann
dropped beta/eta normalization of defining equations
2007-05-17, by haftmann
refined pow function
2007-05-17, by haftmann
abstract size function in hologic.ML
2007-05-17, by haftmann
tuned
2007-05-17, by haftmann
add classes ring_no_zero_divisors and dom
2007-05-17, by huffman
generalize class restrictions on some lemmas
2007-05-17, by huffman
added classes ring_no_zero_divisors and dom (non-commutative version of idom);
2007-05-17, by huffman
Added three items to the signature
2007-05-17, by paulson
generalize some lemmas from field to division_ring
2007-05-17, by huffman
instance division_ring < no_zero_divisors; clean up field instance proofs
2007-05-17, by huffman

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