Summary: To wrap up the year 2019 Samuel Hansen is joined by Katie Steckles and Christian Lawson-Perfect of Aperiodical.com to discuss some of the big stories from the world of mathematics this year.<br> <br> The stories they discuss include Hannah Fry's Royal Institution Christmas Lectures, Karen Uhlenbeck's Abel Prize, year two of the Big Internet Math Off, a new multiplication algorithm, a new pi digits record, 33 and 42 as the sum of three cubes, and advances toward solutions for Collatz and Riemann.<br> <br> Music:<br> lowercase n<br> <br>
