1. The problem statement, all variables and given/known data Using XK-map techniques, obtain the minimum Boolean expression for the following map: 2. Relevant equations 3. The attempt at a solution So I've been doing some reading and I found this has to do with Reed Muller logic. This was unfortunately not covered in the course I'm taking, so I'm a tad bit confused. How exactly am I supposed to circle this map? I know I have to circle groups of zeroes and ones such that the parity of the ones is odd and the parity of the zeroes is even. For reference, the answer is listed as: $$Z = \bar a \bigoplus b \bigoplus c \bigoplus d$$ I have experimented with a few circling combinations, but cannot find one that gives the answer above.