Albert Girard (1595-1632) was a French-born mathematician who studied at the University of Leiden. He was the first to use the abbreviations ‘sin’, ‘cos’ and ‘tan’ for the trigonometric functions.

## Archive for December, 2014

### Fermat’s Christmas Theorem

Published December 25, 2014 Occasional Leave a CommentTags: Arithmetic, Number Theory, Pi, Primes, Spherical Trigonometry

### Information Theory

Published December 18, 2014 Irish Times Leave a CommentTags: Algorithms, Computer Science

That’s Maths in *The Irish Times* this week (TM059, or Search for “thatsmaths” at irishtimes.com) is about data compression and its uses in modern technology.

### New Curves for Old: Inversion

Published December 11, 2014 Occasional Leave a CommentTags: Analysis, Geometry, Maps

**Special Curves**

A large number of curves, called *special curves*, have been studied by mathematicians. A curve is the path traced out by a point moving in space. To keep things simple, we assume that the point is confined to two-dimensional Euclidean space so that it generates a plane curve as it moves. This, a curve results from a mapping . Continue reading ‘New Curves for Old: Inversion’

### The Year of George Boole

Published December 4, 2014 Irish Times Leave a CommentTags: Algorithms, Computer Science, History, Logic

This week’s *That’s Maths* column in *The Irish Times* (TM058, or search for “thatsmaths” at irishtimes.com) is about George Boole, the first Professor of Mathematics at Queen’s College Cork.