The Fields medallist reveals the beauty of numbers, how he drew inspiration from Sanskrit maths and a Rubik's cube, and how his maths fits with his tabla playing.
Martin Grötschel, Secretary of the International Mathematical Union, about maths at school, integrating developing nations, and his dream of putting all maths that's ever been produced online.
Stanley Osher has won the 2014 Gauss Prize for his revolutionary impact in areas including medical imaging, sonic booms, movie animation and microchip design and
manufacture.