
A conversation about mathematics inspired by a pair of skipping ropes. Presented by Katie Steckles and Peter Rowlett.

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A conversation about mathematics inspired by a pair of skipping ropes. Presented by Katie Steckles and Peter Rowlett.

Podcast: Play in new window | Download
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A book about mental arithmetic? By Rob Eastaway? Count me in! In my fuzzy mental Euler diagram of topics and authors, Maths On The Back Of An Envelope lies in the intersection of several ‘favourite’ circles.
Perhaps paradoxically, this meant I was expecting to be a little disappointed: how can a book, by an author I admire, on a topic I both love and have Strong Opinions about, live up to what I’d like it to be? Luckily, Eastaway’s writing is excellent, even taking into account that you expect it to be excellent.
I have two simple rules for deciding whether a popular maths book is Any Good. Firstly: does it teach me something I didn’t know? And secondly: does it entertain me when treading ground I’m familiar with?

Aperiodicolleague Kit Yates has recently had a new book out: The Maths of Life and Death. He’s kindly agreed to share a sample chapter with us, explaining the God Equation: it’s used by NICE to decide whether to fund new drugs.
In my new book, The Maths of Life and Death, I explore the true stories of life-changing events in which the application (or misapplication) of mathematics has played a critical role: patients crippled by faulty genes and entrepreneurs bankrupt by faulty algorithms; innocent victims of miscarriages of justice and the unwitting victims of software glitches. I follow stories of investors who have lost fortunes and parents who have lost children, all because of mathematical misunderstanding. I wrestle with ethical dilemmas from screening to statistical subterfuge and examine pertinent societal issues such as political referenda, disease prevention, criminal justice and artificial intelligence. I aim to demonstrate that mathematics has something profound or significant to say on all of these subjects, and more.

The UNESCO Executive Board decided in October 2018 to endorse a recommendation, coordinated by the International Mathematical Union, to proclaim an International Day of Mathematics on 14th March each year. This recommendation is on the agenda for the UNESCO General Conference in November 2019 an, if adopted, will have its first official celebration on 14th March 2020, where the proposed theme is ‘Mathematics is Everywhere‘.
Preparations in anticipation for the adoption seem to be heating up, with a publicity drive underway. The IDM website says it will share free materials, projects, ideas and software, as well as a map of worldwide events and gatherings, all in multiple languages and under open licenses. You can sign up for a “one or two emails per month at most” mailing list to keep informed.
More information: The IMU wants to make π Day the International Day of Mathematics (October 2018).

Next Tuesday, October 8th, UCL Mathematics is hosting a Wikithon in celebration of Ada Lovelace Day from 5-7pm. The theme is Diversity in Mathematics, and the aim is to write Wikipedia articles about mathematicians from under-represented groups. The session will be led by Dr Jess Wade BEM (Imperial College, Physics) and Dr Alice White (Wellcome Trust).
Jess Wade was appointed BEM earlier this year for services to Gender Diversity in Science.
If you want to participate, you are asked to bring a laptop – pizza will be provided. You are asked to register (for free) for catering reasons.
We now know that the number 42 can be written as the sum of three cubes:
\[ 42 = (-80538738812075974)^3 + 80435758145817515^3 + 12602123297335631^3 \]
This computational breakthrough was achieved in a collaboration between Andrew Sutherland (MIT) and Andrew Booker (Bristol). They announced the result by both replacing their homepages with the expression – with the page title Life, the Universe and Everything.