Consider this sequence of numbers: 5, 7, 9. Can you spot the pattern? Here’s another with the same pattern: 15, 19, 23. One more: 232, 235, 238. “Three equally spaced things,” says Raghu Meka, a ...

A new proof marks the first progress in decades on a problem about how order emerges from disorder. In February, Sah and Sawhney announced yet another joint accomplishment. With James Leng, a graduate ...