https://arxiv.org/abs/1909.06947

In which we show that the knots K13n592 and K15n41127 (pictured) both have stick number 10. These are the first non-torus knots with more than 9 crossings for which the exact stick number is known.

Fusible Numbers

Article by Erickson, Jeff

In collections: Unusual arithmetic, Easily explained

URL: http://www.mathpuzzle.com/fusible.pdf

Entry: http://read.somethingorotherwhatever.com/entry/Erickson

CRA finally copies MathJobs: https://cra.org/cv-database/

How to peel self-intersecting onions: https://arxiv.org/abs/1909.00263

Update on the Safe ToC initiative: https://windowsontheory.org/2019/08/30/update-on-the-safe-toc-initiative-guest-post-by-sandy-irani/

Sandy Irani describes progress in combatting harassment and discrimination at theoretical computer science conferences, and calls for volunteer advocates to serve as contact points at conferences.

$400 online calculus course for full (transferrable) credit at Pitt: https://outlier.org/calculus

While it's tempting to call this a MOOC, but it's not open. Let's give them the benefit of the doubt and call it a MOC.

(Written when the author was 11, and submitted when he was 12. See the affiliation "Jr. High School 246" on the last page of the article, and the letter from the author's mother on page 91 of the same issue.)

https://www.ams.org/journals/notices/201907/rnoti-p1079.pdf

CS professor at Illinois

Joined May 2017