Tej Chajed authored 4 years ago and Robbert Krebbers committed 4 years ago

Implemented as an algebra for rules about `auth max_natUR` and a
logic-level wrapper for the auth element (a nat) and fragment (a
persistent lower-bound).

Fixes #327.

1.) First `simpl` away all the functors 2.) Don't use `done`, which calls `split`.

Use infix `_frac` for the `●{q}` variants. This was already done for the
external validity lemmas, but not for those for inclusion and internal validity.

put it into a type class `BiPureForall`.

This property does not hold for embeddings of classical logic into Coq.

Fixes a bug from !488