I have written about mathematics for The New Yorker and, lately, also in my book “A Divine Language: Learning Algebra, Geometry, and Calculus at the Edge of Old Age,” and I thought that I had said ...

The American writer Jodi Picoult was invited to contribute to Dear Me, in which she wrote a letter to her younger 16-year old self. It contains some very warm and witty advice, but I was particularly ...