10th December 2025

Very positive response to yesterday's Radio Times post, so here's a couple more things in the same vein. People liked the recursion photos, and one Mark Gatiss fan sent this Radio Times cover from 2017. They are copying their own ideas!

There were some fond memories of this maths textbook from the 1990s

And this is mathematician and comedian Matt Parker with his friends ina very confusing recursion picture

But if youwere hoping for something more Christmasssy from today's Advent Calendar, may I recommend "the book of the classic film, which was originally a book anyway". Maybe they will make it into a film.

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Pearson Textbook Corrections

This page has moved to a Google Doc (so much easier to edit): https://b.link/mathstextbook

Advent Calendar 2025

1st December 2025

Hello! We've sort of lost count, but think the first Advent Calendar was back in 2003, the Internet Archive Wayback Machine says it looked like this: Of course all the links are dead, but the thing it has in common with this year's is that it is still coded in HTML, probably the last thing I will ever rely on coding for. Now it looks like this: Happy Advent! We have gone for the Bonne Maman JAM Calendar again this year, after leaving it too late last year and it selling out at both Fenwick and Selfridges! We get a fresh pot of jam every day to enjoy with our tartines and Ovomaltines. We also have the Domino's "Merry Crustmas" leaflet, and a MUJI calendar we'll show you later in the month. Do let us know what you are opening every day! You can leave a message below, or email us your ideas and suggestions for future days at robotmaths@outlook.com Have a great day!

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