Boolean Identities
After Null & Lobur, The Essentials of Computer Organization and Architecture, Jones and Bartlett, 2003


Identity Name AND Form OR Form
Identity 1A = A 0+A = A
Null (or Dominance) Law 0A = 0 1+A = 1
Idempotence Law AA = A A+A = A
Inverse Law AA = 0 A+A = 1
Commutative Law AB = BA A+B = B+A
Associative Law (AB)C = A(BC) (A+B)+C = A+(B+C)
Distributive Law A+BC = (A+B)(A+C) A(B+C) = AB+AC
Absorption Law A(A+B) = A A+AB = A
DeMorgan's Law (AB) = A+B (A+B) = A B
Double Complement Law =
A = A