Omega is the first transinite ordinal in the set of 0, 1, 2, ..., , , , ... This set is well ordered, so is after therefore is before . What is before ? Options: 1. -1 This is confusing, since if is the first transfinite ordinal, then -1 should be the last finite ordinal, which simply does not exist. 2. Undefined 3. Nothing (just like in the set of natural numbers (N1), there is nothing before one) Thank you for the replys.