Alexander Brown FRSE FRSSAf (1878–1947) was a Scottish-born mathematician and educator in South Africa.
He contributed to the study of the ratio of incommensurables in geometry and relations between the distances of a point from three vertices of a regular polygon.
He attended Newton Public School and then George Watson's College, where he was the winner of the Wright Bursary in his final year.
[2] In 1903 he became Deputy Professor of Applied Mathematics and Physics for one year at the South African College, Cape Town in the absence of the holder of the chair, Carruthers Beattie, who was on a year-long magnetic survey of South Africa.
[2] He contributed to the study of the ratio of incommensurables in geometry and relations between the distances of a point from three vertices of a regular polygon.