Llewellyn Thomas

Llewellyn Hilleth Thomas
Copenhagen 1926
Born	(1903-10-21)21 October 1903 London, United Kingdom
Died	20 April 1992(1992-04-20) (aged 88) Raleigh, North Carolina, USA
Known for	Thomas precession Thomas algorithm Thomas-Fermi model Thomas-Fermi screening Thomas-Fermi equation
Awards	Smith's Prize (1925)
Scientific career
Thesis	Contributions to the theory of the motion of electrified particles through matter and some effects of that motion  (1927)

Llewellyn Hilleth Thomas (21 October 1903 – 20 April 1992) was a British physicist and applied mathematician.^[1] He is best known for his contributions to atomic and molecular physics and solid-state physics. His key achievements include calculating relativistic effects on the spin-orbit interaction in a hydrogen atom (Thomas precession), creating an approximate theory of ${\displaystyle N}$-body quantum systems (Thomas-Fermi theory), and devising an efficient method for solving tridiagonal system of linear equations (Thomas algorithm).