
The Aperiodical
Occasional(ly) mathematical blogging
Latest episodes

Mar 5, 2013 • 30min
All Squared, Number 2 – Pancake formula
Here’s the second edition of our new podcast, All Squared. This time we talked to Dr Andrew Taylor, PhD, about nonsense formulas in the news. In particular, since we recorded very close to pancake day, we took a close look at the various “formulas for the perfect pancake” printed in UK newspapers.
Here are some links to the things we referred to, along with some further reading. Since we found so many nonsense formula stories, I’ll split the links into two sections: nonsense and the rest.
Nonsense formula stories
Flipping clever! Formula for the perfect pancake revealed by maths boffins (but we’ll still end up with ours stuck to the ceiling) – Daily Mail (2013)
The perfect pancake? Easy, just follow this formula … 100 – [10L – 7F + C(k – C) + T(m – T)]/(S – E) – Daily Mail (2009); the one with the amazing stock photo
Formula for perfect pancake unveiled by scientists – The Telegraph (2009)
How to toss the perfect pancake – Daily Express; the one without the actual formula
The perfect pancake toss – Shortlist; includes the formula
Why today’s the perfect day to change your life – Daily Mail
Revealed: The formula for a perfect family Christmas – drink two parts wine for every three chocolates – Daily Mail
Scientists are serious about having a laugh – The Telegraph
Scientists reveal formula for the perfect sitcom – The Telegraph
Horror’s perfect formula – London Evening Standard; the one where “blood and guts” = $\sin x$.
Here’s my happy marriage secret: avoid romance – The Telegraph
The formula for perfect parking – NPR
The rest
The geometry of perfect parking – Simon Blackburn; PDF
The Tommy Westphall universe
Jewish Problems – Tanya Khovanova’s collection of Russian “coffin” problems on the arXiv, including number 1’s quickly-read puzzle.
Mathematical Puzzles, a Connoisseur’s Collection, by Peter Winkler
The Muddy Children: a logic for public announcement – slides by Jesse Hughes
CP’s Interesting Esoterica collection
Number 3 will appear in exactly 9 days. You can probably guess what it’ll be about. But can you guess who we’ll be talking to?
You can subscribe to All Squared through our RSS feed. We’ll set up an iTunes thing if anyone asks for it.

Feb 24, 2013 • 27min
All Squared, Number 1: Maths out loud
We’ve been quietly making plans and gathering material for a new project over the past couple of weeks, after noticing that there’s an unusual paucity of maths podcasts at the moment. Well, that exciting new project is now happening, and it’s a half-hour podcast featuring maths, guests, puzzles and links from the internet. It’s called All Squared, and it’ll contain cringe-inducing intro/ending contrivances, interesting guest interviews on topical and other subjects, and a panoply of mathematical curiosities.
This is the first number of the podcast (we thought ‘episode’ would set unrealistic expectations of regularity, and we can never resist a pun). It includes an interview with Edmund Harriss about spoken mathematics, as well as a puzzle which we’ll give the answer to in the next number, and a great mathematical flash game to keep you occupied until that appears.
Here are some links to the things we referred to, along with some further reading:
Mathematics Out Loud at Maxwell’s Demon, Edmund’s blog
Milton’s Paradise Lost (Project Gutenberg ebook version)
The Pythagorean Proposition, a book containing nearly 370 proofs
The proof of Pythagoras’ theorem that Katie gave
Pythagorean Theorem poem
Maths Poetry at Mr P’s Maths Page
Gunfight at the cubic corral – Thony Christie on Cardano, Tartaglia and 16th Century maths competitions
The same topic at The Story of Mathematics
CP’s proof without words on YouTube
Edmund says Sphere Packings, Lattices and Groups by John Conway is particularly readable.
Z-Rox, the dimensionally deficient game, at Kongregate
Number 2 (or should it be 4?) will appear soonish.

Feb 13, 2013 • 23min
Aperiodcast – 11/02/2013
Two days late, because that is the way we rotate here, it’s another episode of our sporadic navel-gazing podcast.
In this episode we talked about:
Our piece on the Invariant Subspace Problem (and the more recent news)
Log-log! Who’s there? Not a power law!
Our coverage of the new Mersenne Prime news, and our meta-coverage of everyone else’s coverage of it
The good, the bad, and Gowers
Interesting comments discussion on the ‘What is a mathematician’ post
The first in Katie’s series of Open Season posts, on Singmaster’s Conjecture
Please consider hosting the Carnival of Mathematics
Mysterious upcoming project – watch this space
As always, we’re keen to hear about your mathematical exploits either by email to root@aperiodical.com or through our new, streamlined sending-something-in form.

Jan 13, 2013 • 23min
Aperiodcast – Christiansmas Eve 2013
After two months we’ve finally done another podcast! We completely forgot even the most rudimentary things about how to do a podcast. Sorry.
In this episode, we talked about:
Mathematical Christmas cracker jokes
Fractal Christmas trees
Posts from MathsJam speakers – Tom Button on Radii of Polyhedra and Phil Harvey on AS Results and Batting Averages
The Aperiodical’s Mathematical Survey
Carnival of Mathematics 94
As always, we’re keen to hear about your mathematical exploits either by email to root@aperiodical.com or through our new, streamlined sending-something-in form.
If you’ve got some ideas for how we can do a better podcast, we’d be particularly keen to hear from you.

Nov 20, 2012 • 11min
Aperiodcast – MathsJam 2012!
We took the opportunity of us all being in the same small slice of space and time (MathsJam, last weekend) to record another episode of our continuing audio part-work, The Aperiodcast.
We talked about:
Christian’s Recreational Maths Seminar
Dara O Briain: School of Hard Sums to return; maths students sought to take part
Matt Parker’s Twitter Puzzle – 12th Nov
John McKenna’s helpful comment about our title font
As always, we’re keen to hear about your mathematical exploits either by email at root@aperiodical.com, our twitter @aperiodical, or whatever means you can think of to get in contact with us.

Oct 21, 2012 • 36min
Aperiodcast – 21/10/2012
Here’s another episode of our irregular podcast about what’s been happening on the site.
This time, we talked about:
Advances in pure nonsense
Robert Schneider, Mathematical Musician/Musical Mathematician
#MTT2K: Teachers critique Khan Academy
Surds: what are they good for?
Calculus of the Nervous System
The new fonts on the site
Christian’s new Aperiodical Round Up and Interesting Esoterica Summation
Puzzlebomb October 2012
Christian apologises for the poor sound quality, an unavoidable consequence of being at the family home for the weekend without a proper microphone.
As always, we’re keen to hear about your mathematical exploits either by email at root@aperiodical.com, our twitter @aperiodical, or whatever means you can think of to get in contact with us.

Sep 9, 2012 • 19min
Aperiodcast – 09/09/2012
Leaves are falling, a chilly wind is blowing and I can hear the distant thunder of undergrads’ hooves as they stampede towards my department. Yes, Summer is giving way to Autumn, so it’s time for another Aperiodcast. If you had “42 days” in the “when will the next Aperiodcast appear” sweepstake, report to the comments section below for your prize.
In this episode Peter and Christian were enjoying the comforts of their respective homes, while Katie was preparing to be sawn in half by a crazed Matt Parker at the British Science Festival. We talked about:
Bill Thurston has died
A glider on an aperiodic cellular automaton exists! (and the alternative glider Tim Hutton posted on Google+)
Knitty spiked icosahedron
Puzzlebomb – September 2012
Matt Parker needs help building a domino computer
As always, we’re keen to hear about your mathematical exploits at root@aperiodical.com, and you still have eight days to submit items for the 90th Carnival of Mathematics, which you can do through our form.

Jul 29, 2012 • 19min
Aperiodcast – 29/07/2012
Here’s the fifth Aperiodcast, covering what’s happened on the site basically since the start of Summer. Peter is busy doing work, so it was just Katie and me blathering on about a variety of things.
The posts discussed in this episode were:
Telegraph’s open letter to Michael Gove and Vince Cable on numeracy (presented with arithmetic errors), by Peter
More and Less, by Paul Taylor
Interesting Esoterica Summation volume 4, by Christian
Turing Round Up
Open Access Round Up
MathsJam Annual Conference 2012 booking now open
An answer to what Shouryya Ray’s ‘unsolved Newton problem’ was
π vs τ: FOTSN/Tau Day special by Steve Mould and Matt Parker
Carnival of Mathematics 88
Dance Your PhD: Cutting Sequences on the Double Pentagon by Katie
You have three days to submit posts for the next Carnival of Maths, hosted here by Katie.

Jun 21, 2012 • 14min
Aperiodcast – 21/06/2012
Here’s another Aperiodcast, covering things that happened on the site between the 4th and the 20th of June.
Posts discussed in this episode
Ask a mathematician: “Where should we live?” by Alistair Bird
The mathematics examinations faced by school leavers in the Republic of Ireland by Colm Mulcahy
P-Value Extravaganza posted by Christian
The Super Subtraction Feat by Colin Beveridge
Take part!
Writing for The Aperiodical
Send in good new research
Submit an article to the Carnival of Maths

Jun 7, 2012 • 21min
Aperiodcast – 3/6/2012
After an unexpectedly long wait of over three weeks, here’s the third Aperiodcast, discussing what’s happened on the site between 13/5/2012 and 3/6/2012. You’ll notice that we recorded this podcast four days ago – we were all having too much jubilee fun to find time to upload it! Anyway, we had lots to talk about, so please do have a listen.
Posts discussed in this episode:
Has schoolboy genius solved problems that baffled mathematicians for centuries? by Christian and Peter
The Table Never Lies by Mr. Gregg
Puzzlebomb – June 2012 by Katie
In what flipping dimension is a square peg in a round hole just as good as a round peg in a square hole? by Card Colm
The strange case of Misha Verbitsky and the trademarked beard by Christian
P-p-p-publicise a paper! by Christian and Nathan
Aperiodical Round Up 6 – It glides to a stop as it reaches the end of the power stroke by Christian
Open Access Update – 25th of May by Christian