2.4. Principle of Duality
Dual of an expression is obtained by:
Interchanging “0” and “1”
Interchanging “.” and “+”
(Exp)D represent dual of (Exp) examples:
(X+0) D = X.1
(X + Y.Z) D = X.(Y+Z) “**Note: it is not equal to X.Y + Z
You may recognize that Huntington’s first set of Postulates are true for duals (a and b of each
postulate)