AP_THM_TAC : tactic
SYNOPSIS
Strips identical operands from functions on both sides of an equation.
LIBRARY
bool
STRUCTURE
Tactic
DESCRIPTION
When applied to a goal of the form A ?- f x = g x, the tactic AP_THM_TAC strips away the operands of the function application: 
    A ?- f x = g x
   ================  AP_THM_TAC
      A ?- f = g

FAILURE
Fails unless the goal has the above form, namely an equation both sides of which consist of function applications to the same arguments.
SEEALSO
AP_TERM, AP_TERM_TAC, AP_THM, MK_COMB_TAC, ABS_TAC, EXT
HOL  Kananaskis-13