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Suppose that you have a few kinds of things, for any two things of the same kind, there is a way to find a number that tells you how different (or how far away) two things are. Let's say that you have a relationship between two things that changes things you give it into other things. That relationship is said to approach something near a place, if, for any number, there is another number such that when you give the relationship something that is closer to the place than that second number is to 0, the relationship will give you something that is closer to the thing it approaches than the first number is to 0. HINTS Top Latest Library RANDOM

Created by Inspired by XKCD . (the image is from #386 .)Created by Theo Sanderson . How does it work Follow @theosanderson

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