Dear Michael,Thanks for your reply, I managed to solve the problem. As a 
complementary question,  I wonder if HOL4 can use more than one core for its 
computations.
Regards,Hamed Nemati
 

    On Sunday, July 24, 2016 5:39 AM, "michael.norr...@data61.csiro.au" 
<michael.norr...@data61.csiro.au> wrote:
 

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div.yiv7118188152WordSection1 {}#yiv7118188152 One approach would be to define 
constants that do the abbreviation for you.  Then you should recast the 
theorems/definitions that EVAL is using to also use those new constants.  I'm 
afraid there isn't any code already around that automatically detects repeated 
sub-terms, so you'd have to write some custom SML to get exactly the behaviour 
you want.    Michael    From: hamed nemati <hn_nemati1...@yahoo.com>
Reply-To: hamed nemati <hn_nemati1...@yahoo.com>
Date: Sunday, 24 July 2016 at 02:59
To: HOL-info List <hol-info@lists.sourceforge.net>
Subject: [Hol-info] EVAL(tac conv rule)    Dear All, I would be very grateful 
if someone can help me with the following issue,    When I am applying  
(RESTR_) EVAL(TAC/ CONV / RULE etc.) to evaluate a term I get a very huge 
result which has sub-terms repeat several times inside. Is there any smarter 
version of EVAL(tac conv rule) which avoids expanding the same sub-terms 
repeatedly by for example abbreviating them. This would decrease evaluation 
time and make the evaluated term much shorter.    Regards, Hamed Nemati    

  
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