We’ve often mentioned category theorist and occasional media-equation-provider Eugenia Cheng on the site, and she’s now produced a book, Cakes, Custard and Category Theory, which we thought we’d review. In a stupid way.

# You're reading: Reviews

### Review: The Illustrated Lilavati, by Somdip Datta

Somdip Datta wrote in to tell us about his illustration of the classic maths textbook, *Lilavati*, by the Indian mathematician Bhāskara II.

*Lilavati* contains definitions, algorithms and problems dealing with arithmetic, geometry, combinations, and quadratic equations, all written in meter.

### Review: CALX, a calculator for iPhone

Reader Danial Clelland wrote in to tell us about his new calculator app for iPhone, CALX.

None of us owns an iPhone, but I borrowed someone else’s for a while and had a brief look at the app.

### Review: The Mathematics of Love

This is a review of *The Mathematics of Love: Patterns, Proofs and the search for the Ultimate Equation* by Hannah Fry, a new book which Katie was sent an advance copy of.

*3rd February 2015 (hardcover); Simon & Schuster/TED*

Hannah Fry, who’s a lecturer and public engagement fellow at UCL, has written a book. Following a TEDx talk she gave last spring, Hannah was invited by TED to be one of 12 speakers who got the chance to put their ideas into book form. Her topic was the mathematics of love, and the result is this collection of mathematical stories and techniques for navigating the world of romance, from choosing a partner to keeping hold of one.

### Review: “The Theory of Everything”

A few days ago, friend of The Aperiodical James Grime contacted me asking if I would be able to review *The Theory of Everything*. Obviously I was flattered. In a past life I did some mathematics/physics in the same ballpark as Hawking’s celebrated black-hole work so guessed James was asking because he knew I used to know something about this. Or perhaps it was because he knew that Hawking ran over my foot in a bar at the 17^{th} International General Relativity and Gravitation conference in Dublin back in 2004? Either way, James had given me a pass to go and watch the beautiful Eddie Redmayne for the evening!

### An Alan Turing expert answers your The Imitation Game questions

*The Imitation Game* is the new film starring Sherlock Holmes as Benedict Cumberbatch as Alan Turing, and Keira Knightley as Kate Winslet as Joan Clarke. Together they are two mathematicians in World War II trying to build a bombe. The film will soon be available on DVD, blu-ray, and as an animated GIF set on tumblr.

These are the *Imitation Game* FAQs.

### Some more games to entertain a commutative mathematician

A while ago I collected a few of the mathsy games I play on my phone to while away my commute. I’ve found a few new ones since then, so I thought I’d do a new post to tell you about them.