Re: [Hol-info] New tactic: IMP_REWRITE_TAC

2014-02-13 Thread Michael Norrish
On 13/02/14 04:46, Vincent Aravantinos wrote: Then considering leaving the goal unchanged, well it is a matter of taste... I know it is the standard to leave the goal unchanged. But I personally met many buggy situations that I hardly detected because HOL {4,Light} was just allowing a

Re: [Hol-info] Learning HOL Light

2014-02-13 Thread Bill Richter
Thanks, John! I'll read p 34 more carefully. Your example shows the behavior I'd want from REWRITE_TAC. You theorem is # ADD_AC;; val it : thm = |- m + n = n + m /\ (m + n) + p = m + n + p /\ m + n + p = n + m + p This is a good exercise for my right associativity skill. and that's what it