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.

put it into a type class `BiPureForall`.

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