Take an outline map of the lower 48 U.S. states and four crayons. Can you shade in the map so that every state is a different color than each of its neighbors, without resorting to a fifth color? This ...

Australian National University provides funding as a member of The Conversation AU. Recently, as a community ambassador for ANU Student Equity, I took to a local secondary school to talk maths with a ...

All the Latest Game Footage and Images from The Four Colour Theorem The Four Colour Theorem is a game of competitive colouring in. Challenge yourself to colour in the pictures so that none of the ...

Imagine you're a mapmaker, ready to finish your masterpiece map of the world. The only thing left to do is add the colors. But how many colors do you need for the countries if you want to make sure no ...

It should be possible to colour in any map using just four colours and with no two adjacent regions ending up the same colour. Did you get something like this?

2025 marked a historic year in mathematics. Researchers solved a major case of Hilbert’s ambitious sixth problem, proved a sweeping new theorem about hyperbolic surfaces, and settled the longstanding ...

Mathematician Kenneth I. Appel used an I.B.M. computer in 1976 to prove a century-old problem concerning colors on a map, and from there computers were used to provide proofs for higher and higher ...

Computer-assisted of mathematical proofs are not new. For example, computers were used to confirm the so-called 'four color theorem.' In a short release, 'Proof by computer,' the American Mathematical ...