Geoffrey Charles Smith, MBE (born 1953) is a British mathematician. He is Senior Lecturer in Mathematics at the University of Bath (where he works in group theory) and current professor in residence at Wells Cathedral School.
Smith was the leader of the United Kingdom team at the International Mathematical Olympiad between 2002 and 2010, a longer continuous period than any other person. He returned to the position as leader of the British Mathematical Olympiad from 2013.
Smith oversaw a quantitative increase in training: annual events in Bath (moving to The Queen's College, Oxford, from 2009), at Oundle School, in Hungary, at Trinity College, Cambridge, and immediately prior to the IMO itself. He also thrice won the IMO Golden Microphone, awarded to the national team leader who makes the most speeches to the IMO Jury. In 2010, he was elected to the IMO Advisory Board for a four-year period. Smith was elected as the chair of the International Mathematical Olympiad for the term of 2014-2018 and was re-elected in 2018.
As well as group theory, he is also interested in Euclidean geometry. He often collaborates with Christopher Bradley and David Monk, and has published several papers on Forum Geometricorum, the online geometry journal.
- Geoff Smith at the Mathematics Genealogy Project
- "International Mathematical Olympiad 2010 UK leader's report" (PDF).
- "International Mathematical Olympiad United Kingdom participants 2013".
- "IMO Squad Training Camps".
- "International Mathematical Olympiad Golden Microphone".
- "IMO Advisory Board 2011".
- "IMO Chair 2014-2018".
- "IMO Chair 2018-2022".
- "Forum Geometricorum".
- "Dr Geoff Smith awarded MBE in Queen's Birthday Honours".