src/HOL/ex/Normalization_by_Evaluation.thy
2010-12-07 haftmann 2010-12-07 removed experimental equality checking of closures; acknowledge underapproximation of equality in function name
2010-11-26 haftmann 2010-11-26 nbe decides equality of abstractions by extensionality
2010-09-15 haftmann 2010-09-15 more explicit theory name