## About

Famous for his work in the mathematical sub-fields of low-dimensional topology and geometric group theory, this University of California-Berkeley professor proved the Poincaré Conjecture and devised the Stallings Theorem about Ends of Groups.

## Before Fame

After earning his undergraduate degree from the University of Arkansas, he received his mathematics doctorate from Princeton University.

## Trivia

He was the 1970 recipient of the American Mathematical Society's Frank Nelson Cole Prize in Algebra.

## Family Life

He was born and raised in Morrilton, Arkansas, and he later lived and worked in Berkeley, California.

## Associated With

He and fellow American mathematician David Gale were contemporaries.