Henry John Stephen Smith
Henry John Stephen Smith was a mathematician remembered for his work in elementary divisors, quadratic forms, and SmithMinkowskiSiegel 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 born in Dublin, Ireland, the fourth child of John Smith, a barrister, who died when Henry was two. His mother very soon afterwards moved the family to England. He lived in several places in England as a boy, and had private tutors for his education. His mother did not send him to school but educated him herself until age 11, at which point she hired private tutors. At ageSmith was admitted in 1841 to Rugby School in Warwickshire, where Thomas Arnold was the schools headmaster. This came about because his tutor Henry Highton took up a housemaster position there.
Source: Wikipedia