If 1 2 6 and 3 4 9 July 8, 2019 16 32 64 128 If a 1 2 3 and b 1 4 6 9 If a 1 2 3 5 and b 4 6 9 If a 1 2 3 b 1 4 6 9 and r is a relation from a to b If 1 2 3 If 2 3 A 1 2 3 4 5 6 If conditional 1 and 2 If conditional 0 1 2 3