Since it’s the time of year when you might be looking for mathematical gifts to buy for your friends, colleagues and loves ones, I thought I’d share some recommendations and suggestions for places to find gifts online.

# Aperiodical News Roundup – November 2023

Here’s a selection of mathematical news from the month of November that we didn’t otherwise mention on the site. Proof News The dream team of Tim Gowers, Ben Green, Freddie Manners and Terence Tao (pictured above) claim to have solved the polynomial Freiman-Ruzsa conjecture (originally conjectured by Hungarian mathematician Katalin Marton), which is described by…

# Carnival of Mathematics 222

The next issue of the Carnival of Mathematics, rounding up blog posts from the month of November 2023, is now online at John D Cook’s blog. The Carnival rounds up maths blog posts from all over the internet, including some from our own Aperiodical. See our Carnival of Mathematics page for more information.

# $$-e^{i\pi}$$ to Watch: Sum and Product

In this series of posts, we’ll be featuring mathematical video and streaming channels from all over the internet, by speaking to the creators of the channel and asking them about what they do. We spoke to Bernhard Werner, who’s recently started a YouTube channel called Sum and Product to share mathematical visualisations and explanations.

# Primes, reversals and concatenations

In the last Finite Group livestream, Katie told us about emirps. If a number p is prime, and reversing its digits is also prime, the reversal is an emirp (‘prime’ backwards, geddit?). For example, 13, 3541 and 9999713 are prime. Reversing their digits we get the primes 31, 1453 and 3179999, so these are all…

# Mathematical Drawing Hacks

At this year’s MathsJam UK Gathering, I had the pleasure of running one of the Saturday Night Tables – a chance to invite attendees at the Gathering to drop by and play with something. Together with fellow Manchester MathsJam regular Andrew Taylor, I ran a table of Mathematical Drawing Hacks – ways to make drawing…

# 21X competition – results

A while ago we announced a competition to win a copy of algebraic blackjack game 21X, which was recently successful on Kickstarter, smashing its funding target by an order of magnitude. If you’d like to pre-order a copy of the game, you can sign up to be notified when that’s possible. We had over 30…