I haven't posted anything mathy in a while. So here is something.
http://mdm4u1.wetpaint.com/
Yesterday, my sister Jayme, whose taking a statistics course at Wichita State, asked about some of her homework problems. She's doing (too much) combinatorics in her stats class and I didn't really know the answers. So I searched the web-web and happened accross MDM4U1, a crappy name. But it's a pretty nice little place.
It's a wiki for mathematics and statistics topics. The entry I referred her to (about permutations with identical elements) was easy to follow and helpful. It seems like a good idea.
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