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links, links, links

Cool free math books:

• K.D. Stroyan: "Foundations of Infinitesimal Calculus". Check out his home page too while you're there with lots of Mathematica notebooks to accompany the book.
• E. H. Connell: "Elements of Abstract and Linear Algebra"
• Carl Wagner: "CHOICE, CHANCE, AND INFERENCE: An Introduction to Combinatorics, Probability and Statistics"
• William Stein: "Elementary Number Theory"
• S. Dasgupta, C.H. Papadimitriou, and U.V. Vazirani: "Algorithms"

Fascinating New Yorker article about the people involved in the solution to the Poincare conjecture. And in case you want to know more about the Poincare conjecture, you can follow James Tauber on his Poincare Project.

A coworker gave me this link to Eliezer S. Yudkowsky's home page with some great pieces to read. My favorite is his Intuitive Explanation of Bayesian Reasoning.