REMOVE_THEN : string -> thm_tactic -> tactic
Apply a theorem tactic to named assumption, removing the assumption.
The tactic REMOVE_THEN "name" ttac applies the theorem-tactic ttac to the
assumption labelled name (or the first in the list if there is more than
one), removing the assumption from the goal.
- FAILURE CONDITIONS
Fails if there is no assumption of that name or if the theorem-tactic fails
when applied to it.
See LABEL_TAC for a relevant example.
Using an assumption identified by name that will not be needed again in the
- SEE ALSO
ASSUME, FIND_ASSUM, HYP, LABEL_TAC, USE_THEN.