A French mathematician who says maths "gives you wings" has been awarded the Abel Prize - one of the most prestigious honours in the field. Michel Talagrand, 72, received the award for his ...

Data clustering is the process of grouping data items so that similar items are placed in the same cluster. There are several different clustering techniques, and each technique has many variations.

A multivariate Gaussian distribution extends the ideas. Suppose that instead of looking at just the heights of men, you look at each man's height and weight. So a data item is a vector that looks like ...