Meet the gyroid
What do butterflies, ketchup, microcellular structures, and plastics have in common? It's a curious minimal surface called the gyroid.
A convex function. Image: Eli Osherovich.
Convex or concave? It's a question we usually answer just by looking at something. It's convex if it bulges outwards and concave if it bulges inwards.
Usain Bolt, the "fastest man on the planet", aims to get his 100 metre world record of 9.58 seconds down to 9.40 seconds. What has mathematics got to say about this quest?
Plus has teamed up with the Royal Society Summer Science Exhibition 2011 to reveal the maths behind some of the science on show. The Maths Inside project is run by the Mathematics Promotion Unit (a collaboration between the London Mathematical Society and the Institute of Mathematics and its Applications) in conjunction with Plus and the Royal Society.