Among other contributions, he is known for the Williamson construction of Hadamard matrices.
[1] Williamson graduated from the University of Edinburgh with first-class honours in 1922.
Awarded a Commonwealth Fellowship in 1925, he studied at the University of Chicago under the direction of L. E. Dickson and E. H. Moore, receiving the Ph.D. in 1927.
He held a Lectureship in Mathematics at the University of St Andrews and an Associate Professorship in Mathematics at Johns Hopkins University.
This article about a United Kingdom mathematician is a stub.