As an undergraduate, Rubin was named a Putnam Fellow on four occasions, the first time in 1970, aged 14, making him the youngest Fellow to date.
Rubin was named a Putnam Fellow on four occasions in 1970. This was as an undergraduate. Four occasions in 1970 were aged 14. Rubin was making him the youngest Fellow to date. This was as an undergraduate. Four occasions were the first time.