
Euler's polyhedron formula
This surprising result about 3D shapes tells us something deep about the nature of space.
Can you find a path through on this city map that crosses every bridge exactly once? Euler's answer to this problem started off the filed of graph theory.
Mathematicians mingle at the ECM at the Technische Universität Berlin. Image from the ECM website.
Prime numbers, fluid dynamics and architecture at the European Congress of Mathematics in Berlin.