In my experience wiki articles on mathematics are really bad for learning about a new topic. What they are good for is brushing up on something you once knew, o

In my experience wiki articles on mathematics are really bad for learning about a new topic. What they are good for is brushing up on something you once knew, or learning a few new details about something. But this is almost a necessity, since people will have so different backgrounds. Just imagine bringing a first-grader up to speed on the gibbs phenomenon. That's a lot of things they need to learn first. Mathematics is, unlike almost any other subject a tower of learning where everything builds on the previous level. So it's uniquely hard.