I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

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When my students grow too dependent on their calculators, I ask them to find a number that, when multiplied by itself, gives them 2. Students quickly see that since 1² = 1 and 2² = 4, the answer has ...

Using high school algebra and geometry, and knowing just one rational point on a circle or elliptic curve, we can locate infinitely many others. You’re sitting at the end of a long conference table, ...

On weekdays, he stands in front of a classroom of 20, dry-erase marker in hand, gently guiding students through trigonometry, ...

The assumption in the main result of Basic differential forms for actions of Lie groups (Proc. Amer. Math. Soc. 124 (1996), 1633-1642) is removed. Journal Information This monthly journal, begun in ...