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 ...

Amazonのアソシエイトとして、ヘルシーちゃん@薄荷療養所は適格販売により収入を得ています。 海辺の薄荷療養所で静かな日々を送るぬいぐるみのヘルシーちゃんは、ある日、ふと映画『容疑者xの献身』を観ることにしました。その中で展開される論理的 ...

In the 1970s, a remarkable thing was done; a computer was used to solve a math problem. This, in and of itself, was not remarkable. The difference engine could do it. But this problem was the first ...

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 ...

Allow me to introduce you to what was, for over 100 years, the Four Color Conjecture—that is, until the mid '70s, when mathematicians Appel and Haken made it the first major mathematical concept to be ...