In the last section of the second reading material “Kmaps”
the sections is titled INVALID INPUTS
in the example given where F(w, x, y, z) = w’z + yz
0000, 0010, 0101, and 1100, where labeled as undefined.
Why are those undefined?
why are those values X?
What I’ve tried
I drew up my own Kmap for the example F(w, x, y, z) = w’z + yz
I understand that in the function x isn’t used but not sure what that has to do with it.
Thank you very much!