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Re: strange booleanconvert behavior?

  • To: mathgroup at
  • Subject: [mg127374] Re: strange booleanconvert behavior?
  • From: Francisco Gutierrez <fgutiers2002 at>
  • Date: Fri, 20 Jul 2012 03:53:53 -0400 (EDT)
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  • Reply-to: Francisco Gutierrez <fgutiers2002 at>

Many thanks to Dave Snead and Peter Pein for their responses to my query about BooleanConvert behavior.

The solutions worked. At the same time, it is clear that BooleanConvert has a quirk (or the documentation is severely incomplete). Hope in version 9 it is fixed


From: Dave Snead <dsnead6 at>
To: mathgroup at 
Sent: Wednesday, July 11, 2012 1:20 AM
Subject: [mg127374] Re: strange booleanconvert behavior?

Found the same problem.
Clearly Mathematica isn't working correctly when the number of sublists is 
more than 9.
As a work around consider

x = BooleanConvert[Take[num2, 9], "CNF"];
y = BooleanConvert[Drop[num2, 9], "CNF"];
BooleanConvert[x || y, "CNF"]


-----Original Message----- 
From: Francisco Gutierrez
Sent: Monday, July 09, 2012 9:42 PM
To: mathgroup at
Subject: [mg127374] strange booleanconvert behavior?

Dear Group:
Say I have the following expression:

I transform it into a logical expression:

I want to simplify this to a CNF, and the obvious function to use is Boolean 
Convert. Suppose I apply it to NINE elements of num2:
The output is=


It works perfectly well!

However, if I apply BooleanConvert to the whole expression I get back a 
bunch of crap. Also if I apply it to 10 elements of num2.
In sum, it appears that BooleanConvert only works well for 9 expressions or 
less. Tried this with other two examples, and found
exactly the same result.

All this in Mathematica 8

Can somebody help me?

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