Hello, girls and boys,

my question sounds a bit strange, but it 's very important for me to simplify my 
database queries.
So, is there any known and implementable algorithm that simplifies an arbitrary 
logical expression such as:
(either in PHP-style and in mathematical forms separated by comma)
(A && B) || (B && C) , (A ^ B) v (B ^ C) to:
---------------------
(A || C) && B ,  (A v C) ^ B. // applying distribution rule - I guess this is the 
english name 

or an other ( in PHP-style or if you love better )
(A && B) || B , (A ^ B) v B  to :
--------------
B 

As above I mentioned i'm looking for an algorithm that can be implemented in PHP which 
does as most as possible.
This kind of simplifications is also used in the 'FROM' clause of the SQL-query, and 
that's why I can't pass this job to the DB.

Papp Gyozo 
- [EMAIL PROTECTED]


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