The algorithm at the centre of his method first checks whether the number in question is a perfect square, cube, or other power of a smaller number.

ECONOMIST: Number theory

So at the age of 17, Mr. Wilson secretly auditioned in England and came back with his letter of acceptance at London's Drama Centre, which specialized in Method Acting.

WSJ: Lambert Wilson, Reloaded

The Shia objections that delayed the rescheduled signing ceremony on Friday centre on the proposed structure of the presidential council and the method of voting on a permanent constitution.

ECONOMIST: Political snags, security woes | The