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Thursday, January 17, 2019

**Abstract:** A recent DriveTime commercial features a mathematician at a blackboard supposedly solving "Carmichael's totient conjecture". This is a real problem concerning Euler's $\phi$-function, and remains unsolved, despite the claim made in the ad. We will describe the history of the conjecture and what has been done to try to solve it.

Thursday, January 24, 2019

Thursday, January 31, 2019

Thursday, February 21, 2019

Thursday, February 28, 2019

Thursday, March 7, 2019

Thursday, March 14, 2019