To handle Don't-cares in the Quine-McCluskey method, include them in the first
phase (when finding all prime implicants) and ignore them in the second phase
(when determining which prime implicants to use). In other words, don't put
them into the rows of the unate covering problem instance.

Best Regards,

-Robert Dick-
Received on Thu Oct 2 23:49:53 2008