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Our top 10 posts from 2015

2015 top 10 posts

In 2015 The Aperiodical went from strength to strength again, with 179 posts published by 18 authors. I’ve collected our ten most popular posts from 2015, in case you missed them.

30secondchallenge featured image10. Take the 30 second arithmetic challenge

by Christian

Me first! Just squeezing into the top 10 is my post about a rather hard arithmetic game I made, provoked by my grandma-in-law’s ceaseless goading. I think the game was popular with teachers.

Pentagon Tilings - by Wikimedia Commons user EdPeggJr

9. New pentagonal tiling discovered

by Katie

Proof News always does well, and the first such entry in our list is Katie’s post about the newly-discovered irregular pentagon which tiles the plane.

Diagram 3

8. π, Phase Space, and Bouncing Billiard Balls

by Colin Wright

Colin wrote this comprehensive post about a classic mathematical dinner party trick; calculating π by bouncing billiard balls off each other.

It doesn’t work in practice, of course, but that doesn’t stop Colin finding an enlightening perspective on the problem.

7. Mathematical myths, legends and inaccuracies: some examples

by Peter

Peter asked Twitter for examples of commonly-held myths about maths and mathematicians, and Twitter obliged with some surprising stories.

6. The Topological Tverberg Conjecture is False

by Katie

Proof News again! This time, the world of topological combinatorics was rocked by the revalation that the topological Tverberg conjecture wasn’t quite true.

5. Terence Tao has solved the Erdős discrepancy problem!

by Christian

More Proof News, and yet another big achievement by Terry Tao, at the culmination of the Polymath5 project.

This post also features a strong contender for The Aperiodical’s GIF of the Year:


4. Riemann Hypothesis not proved, part 2

by Christian

The biggest Not Proof News story of 2015 – Opeyemi Enoch’s claimed proof of the Riemann hypothesis. Best to start with part 1, but this caused enough of a ruckus that our follow-up on the reaction to the first reactions still made it to position 4 on this list.

zhangold3. Counting From Infinity – A film about Yitang Zhang

by Katie

Yitang Zhang’s story was begging to be made into a film. Back in January, George Csicsery brought out this documentary.

Only the trailer is available online, but that was interesting enough to propel this post to the third spot on our list.

Wax honeycomb foundation

2. Apiological: mathematical speculations about bees (Part 1: Honeycomb geometry)

by Alistair Bird


We’ve been haranguing Alistair for literally years to finish off a post he’d promised to write us about the maths of bees. Well, 2015 was the year it finally happened. And what a post it is! Split into 3 sections because of the huge amounts of bee maths Alistair uncovered.

1. Riemann Hypothesis not proved

by Katie and Christian

By a long, long, way this was our most popular post of 2015. Long story short: dude claims he’s solved the Riemann Hypothesis and won a million dollars; BBC reporter believes him; everyone believes the BBC; turns out there’s no reason to believe the dude.

There was always the slightest chance that it would turn out he did have a good proof, but nothing of the sort has yet emerged.

And who am I kidding, this has to be The Aperiodical’s best GIF of 2015:


(will not be published)

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