Lovely article about a 99-year-old retired math professor who recently published a major result. It's the story of mentorship and multi-generational collaboration. www.nytimes.com/2026/09/06/s...
The 92-Year-Old Mathematician and the Teenage Apprentice (Gift Article)
Joan Birman thought her major discoveries were behind her. Then came an email from a young neighbor — a girl who knew little but wanted to learn.
nytimes.com