Richard S. Ellis

Richard Steven Ellis
Alma mater	University of Massachusetts Amherst
Known for	Gärtner-Ellis theorem
Scientific career
Fields	Probability theory, Large deviations theory
Thesis	Chapman-Eskog-Hilbert Expansion for Models of the Boltzmann Equation  (1972)
Doctoral advisor	Henry McKean

Richard Steven Ellis (May 15, 1947 – July 2, 2018) was an American mathematician.

He was born on May 15, 1947, in Brookline, Massachusetts, to parents Murray and Helen. Ellis graduated from Boston Latin School and attended Harvard University, where he studied German literature and mathematics. He pursued graduate study at the Courant Institute of Mathematical Sciences. In 1972, he received his PhD from the New York University for his thesis Chapman-Eskog-Hilbert Expansion for Models of the Boltzmann Equation under the supervision of Henry McKean. He began teaching at Northwestern University and left for the University of Massachusetts Amherst in 1975. In 1984, he improved a key result in large deviations theory originally due to Jürgen Gärtner, which is now known as Gärtner-Ellis Theorem. He was named fellow of the Institute of Mathematical Statistics in 1999. Ellis died of bile duct cancer in New York City on July 2, 2018, aged 71.

External links

• Oral history interview transcript with Richard Ellis on 27 July 2007, American Institute of Physics, Niels Bohr Library & Archives