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Date: Fri, 23 Feb 90 16:01:19 GMT
From: Mr W Wong <esrtv%cu.warwick.ac.uk@NSFnet-Relay.AC.UK>
Message-Id: <24742.9002231601@clover.warwick.ac.uk>
To: info-hol%clover.ucdavis.edu@NSFnet-Relay.AC.UK

        Has anyone try to follow the last case study
in the HOL Tutorial---Modular Arithmetic? I tried this
afternoon, but I got error messege from HOL(ver1.11).

In the case study, a goal is set up as:

  set_goal([],"!n.NORMAL((\N.T),$plus)(int_mult_set n)");;

and then to prove it by

  expand (GEN_TAC THEN (MATCH_MP_IMP_TAC INT_SBGP_NORMAL));;

HOL replied to  this with:

  OK..
  evaluation failed     dest_imp

I have followed the example step by step. Could anyone tell
me why and how can I get through it.

Wai Wong
esww@eng.warwick.ac.uk
Dept.of Engineering,
University of Warwick,
Coventry England

