British mathematician who greatly influenced the development of homotopy.

As a Commonwealth research fellow (1929–32), Whitehead studied under the American mathematician Oswald Veblen (Veblen, Oswald) at Princeton University and gained his Ph.D. in 1932. Their collaborative publications include The Foundations of Differential Geometry (1932), now regarded as a classic.

Whitehead became tutorial fellow at Balliol College, University of Oxford, in 1933, and, after serving with various government departments during World War II, in 1947 he became Waynflete professor of pure mathematics at Oxford.

After returning to England, Whitehead continued to work in differential geometry and his paper “On the Covering of a Complete Space by the Geodesics Through a Point” (1935), marks a turning point in the study of the subject. He always retained his interest in geometry but from 1941 was primarily concerned on topology. Initially his focus was on the strictly combinatorial type of topology but later he moved towards algebraic topology. He made substantial contributions to homotopy theory (the theory of a special kind of mapping of topological spaces). He set up a school of topology at Oxford. He died while on sabbatical leave at the Institute for Advanced Study.