Basic Identities


(1) x + 0 = x (2) x * 0 = 0
(3) x + 1 = 1 (4) x * 1 = x
(5) x + x = x (6) x * x = x
(7) x + x' = 1 (8) x * x' = 0
(9) x + y = y + x (10) xy = yx
(11) x + (y + z) = (x + y) + z (12) x(yz) = (xy)z
(13) x(y + z) = xy + xz (14) x + yz = (x + y)(x + z)
(15) (x + y)' = x'y' (16) (xy)' = x' + y'
(17) (x')' = x --