By combining the language of groups with that of geometry and linear algebra, Marius Sophus Lie created one of math’s most ...

This is the second post (here’s the first one) about an approach to introducing the derivative to calculus students that is counter to what I’ve seen in textbooks and other traditional treatments of ...

This is a preview. Log in through your library . Abstract Students see that geometric transformations—dilation and translation—correspond to algebraic parameters—m and b—in the familiar equation for a ...

I've been grading calculus exams this week, and even though my students did quite well overall there were a couple of errors that I see every semester. Errors that make mathematicians' heads explode.