John Rigby (mathematician)

[1] He was educated at Manchester Grammar School and Trinity College, Cambridge, where after graduating BA in the Mathematical Tripos he remained for doctoral studies.

[2] His PhD dissertation, supervised by Philip Hall and completed in 1958, was Theory of Finite Linear Groups,[3] and while finishing his work on this he took a job at the Government Communications Headquarters (GCHQ).

[2][4] In 1959 Rigby was appointed to his first academic job, as a lecturer in the School of Mathematics of the University College of South Wales at Cardiff, and remained there until he retired in 1996, and beyond, as he continued to work part-time for some years.

[2] Rigby lectured on complex analysis, drawing complicated curves and perfect circles on the blackboard, where he could make "magnificently accurate diagrams".

He regularly provided solutions to problems raised in the Mathematical Gazette, and an obituary described his research papers as "distinguished by their precision, concise style, and freedom from jargon".