These are the show notes for episode 57 of the Travels in a Mathematical World Podcast. 57 is the so-called Grothendieck prime. The story goes that brilliant mathematician Alexandre Grothendieck was asked to name a prime number and gave 57, which is, of course, not prime. This story is used to illustrate how some mathematicians… Read more »

# Mathematics Today April 2010: University Liaison Officer’s Report

[N.B. Followers of the podcast will know that there was a delay in releasing new episodes, so the podcast has not, at time of writing, reached 60 episodes.] Podcast at sixty By the time you read this, the Travels in a Mathematical World podcast will have released sixty episodes. I began producing the podcast in… Read more »

# Podcast: Episode 56 – Edmund Harriss, Development and teaching of mathematical ideas

These are the show notes for episode 56 of the Travels in a Mathematical World Podcast. 56 is the 6th tetrahedral number, meaning it is the sum of the first six triangular numbers. More about tetrahedral numbers from thesaurus.maths.org. This week on the podcast I spoke to Edmund Harriss of the University of Leicester, and… Read more »

# Podcast: Episode 55 – Edmund Harriss, Tilings, motivations and Street Maths

These are the show notes for episode 55 of the Travels in a Mathematical World Podcast. 55 is the largest triangular number in the Fibonacci sequence. More about 55 from Number Gossip. This week on the podcast I spoke to Edmund Harriss of the University of Leicester, who speaks about his research area of tiling… Read more »

# 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 »