Henry John Stephen Smith was an Irish mathematician and amateur astronomer remembered for his work in elementary divisors, quadratic forms, and Smith–Minkowski–Siegel mass formula in number theory. In matrix theory he is visible today in having his name on the Smith normal form of a matrix. Smith was also first to discover the Cantor set.
- Occupation
- mathematician, university teacher
- Position held
- Savilian Professor of Geometry, keeper, chairperson
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- November 2, 1826, 1826
