GitLab

Using this new typing, prove the stronger soundness statement, moving the evaluation to the conclusion of the theorems.

New typing, proved sound. Also, expressions do not contain machine precision anymore in the case of variables

I also simplified the double pattern matchings used in Expressions.v

Port of Interval Validation to mixed precision. Needed some auxiliary lemmas related to the typing of expressions.

Remove some unused lines from Coq development and rework definitions in HOL4 to contain current state of Coq development

Start working on supporting let statements. Therefore add environment simulation relation and prove preservation by small step semantics for it

Prove new case lemma for Absolute values, easing case distinction in division proof, progress on division, WARNING: COMMIT DOES NOT COMPILE