Power series to the people!

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PlanetMath.org is a (well, I’ll let them say it) “free, collaborative, online mathematics encyclopedia. The stress is on peer review, rigour, openness, pedagogy, real-time content, interlinked content, and community-drivenness.”

Great reference site.

But don’t forget about Mathword, hosted by Wolfram Research, the Mathematica folks.

If you don’t find it on one of these sites, it ain’t math!

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