Then it’s kind of a mystery to try to figure out why and how they’re related.” The Riemann hypothesis has proved to be a font ...

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.

Every morning at 74th Street Elementary School in South Los Angeles, a small figure walks briskly through the front gate. Her name is Linda Ricks; she’s a retired office manager and lifelong community ...