modernized header;

babel: removed unnecessary "french" option, which actually enables french section names etc. on some LaTeX installations;

fixed "latex capacity exceeded"

"Definite Assignment Analysis" included, with proof of correctness. Large adjustments of type safety proof and soundness proof of the axiomatic semantics were necessary. Completeness proof of the loop rule of the axiomatic semantic was altered. So the additional polymorphic variants of some rules could be removed.

Added conditional and (&&) and or (||).

tuned;

Isabelle/Bali sources;