I need some help with dual statements:
1) x*y+(xy+1)= dual x+(y*x)+y * 0= or dual x+(y*x)
2) (x+y)* (0+1) = dual x*y
Are they correct? thank you!
Could you explain what "dual F" means for some Boolean formula F? Usually, to obtain a dual formula one replaces * with + and vice versa (plus some other replacements). I don't see the dual of x * y from the left-hand side, which is x + y.
Also, what does = mean here: equality of syntactic expressions or logical equivalence?