# Countability and uncountability in Facebook groups

If you use Facebook, you may be familiar with the groups based on the ‘million march‘-principle, who are trying to get to a certain number of members to affect some change. A lot of these groups are outright silly, or based around issues unlikely to drum up the enthusiasm of the masses. A quick search… Read more »

# Podcast: Episode 54 – Maths news with Sarah Shepherd

These are the show notes for episode 54 of the Travels in a Mathematical World Podcast. 54 is the number of colored squares on a Rubik’s cube. More about 54 from Number Gossip. This week on the podcast I met Sarah Shepherd, PhD student at the University of Nottingham and Editor of iSquared Magazine, and… Read more »

# Truchet, Braille and Euler

In going through a hard drive I came across some playing around I did a couple of years ago with Truchet tilings which I thought I would share with you here. I came across Truchet tilings in a talk a couple of years ago by Cameron Browne to the London Knowledge Lab‘s Maths-Art Seminar Series…. Read more »

# Carnival of Mathematics

I have recently become aware of the Carnival of Mathematics, a blog carnival operated by Mike Croucher. A blog carnival is a roaming, regular series of blog posts on a particular topic that points to content on other blogs. In this case, the Carnival of Mathematics website has the following description of the content: Pure… Read more »

# Podcast: Episode 53 – Robert Harter – Water waves

These are the show notes for episode 53 of the Travels in a Mathematical World Podcast. 53 is prime, the smallest multidigit balanced prime: primes which are the averages of their prime neighbours. More about 53 from Number Gossip. Robert Harter talks about his PhD research at the University of Manchester into linear water wave… Read more »

# Podcast: Episode 52 – Jackie Grinsell, Mathematics teaching

These are the show notes for episode 52 of the Travels in a Mathematical World Podcast. In a non-leap year, the month and day are simultaneously prime a total of 52 times. More about 52 from Number Gossip. This week on the podcast we hear from Jackie Grinsell, Head of Mathematics, Purbrook Park School, Waterlooville…. Read more »

# Reading list for a keen 13 year old mathematician

I was asked a question from a keen 13 year old school student who has been playing around with Pythagorean triples. I asked Twitter for “inspiring reading” for such a student (and @DrLucyRogers & @MEImath retweeted this request). The responses were good and @robbieg8s wrote to ask me to post the list somewhere. Here it… Read more »