7. Cartesian products
Given two sets, take one element from the first set and pair it up with each element from the second set. Then repeat this for another element from the first set, then another, until you exhaust it. But hey, what's this?
Given two sets, take one element from the first set and pair it up with each element from the second set. Then repeat this for another element from the first set, then another, until you exhaust it. But hey, what's this?