## Credits: addendum for version 6.3

The main changes in version V6.3 was the introduction of a few new tactics and the extension of the guard condition for fixpoint definitions.
B. Barras extended the unification algorithm to complete partial terms and solved various tricky bugs related to universes.
D. Delahaye developed the `AutoRewrite` tactic. He also designed the new behavior of `Intro` and provided the tacticals `First` and `Solve`.
J.-C. Filliâtre developed the `Correctness` tactic.
E. Giménez extended the guard condition in fixpoints.
H. Herbelin designed the new syntax for definitions and extended the `Induction` tactic.
P. Loiseleur developed the `Quote` tactic and the new design of the `Auto` tactic, he also introduced the index of errors in the documentation.
C. Paulin wrote the `Focus` command and introduced the reduction functions in definitions, this last feature was proposed by J.-F. Monin from CNET Lannion.
Orsay, Dec. 1999
Christine Paulin