Little progress had been made in solving Ramsey problems since the 1930s. Now, researchers have found the answer to r(4,t), a longstanding Ramsey problem that has perplexed the math world for decades.

Paul Erdős, known as the most prolific mathematician of the 20th century, proposed many unsolved problems throughout his life, known as 'Erdős problems.' GPT-5.2 Pro solved one of these problems, and ...