With nonmonotonic irregularity, it’s time for another Follow Friday – a round up of the maths people on Twitter you should be following, or at least some fun links you can look at.

1. @mathshistory

Piero della Francesca (1420 – 1492) “pioneered the use of perspective in Renaissance art”, died 12 Oct bit.ly/bxnxds

— Maths History (@mathshistory) October 12, 2012

Interested in broadening your knowledge of maths along the negative axis in the **fourth** dimension (in this case considered as time)? @MathsHistory is a feed by the British Society for the History of Mathematics, and it’s run by several friends of the Aperiodical including Tony Mann and Noel-Ann Bradshaw from the University of Greenwich, and our very own Peter Rowlett. The feed tweets a daily interesting fact about a mathematician relevant to the date, e.g. someone who was born or died on the day in question. It’s like a virtual maths history desk calendar, or mathematician of the day toilet paper (but in a good way).

2. @ajk_44

I was feeling melancholy. Then I remembered I have the Set app on my phone! #MathsJam

— Alison Kiddle (@ajk_44) August 9, 2012

Alison works for maths activities behemoth NRICH, and runs the Cambridge MathsJam. These are two reasons to follow her already. She also tweets and retweets interesting, thought-provoking and fun maths stuff – there you go, decision made.

3. @alexbellos

I bought a Nespresso capsule stand. Can anyone invent a Connect 4-like game to play on it over breakfast, pls? amazon.co.uk/Tavola-Capstor… #gdnsci

— alex bellos (@alexbellos) October 10, 2012

He writes amazing books about maths (if you haven’t read them, do – I’m so full of recommendations today). He also, it turns out, writes amazing tweets about maths, as well as other things. Well worth a follow.