Dunham Jackson (July 24, 1888, Bridgewater, Massachusetts – November 6, 1946) was a mathematician who worked within approximation theory, notably with trigonometrical and orthogonal polynomials. He is known for Jackson's inequality. He was awarded the Chauvenet Prize in 1935. His book Fourier Series and Orthogonal Polynomials (dated 1941) was reprinted in 2004.
- Dunham Jackson: The Theory of Approximation. AMS, 1930.
- Dunham Jackson: Fourier Series and Orthogonal Polynomials. Carus Mathematical Monographs, 1941.
- Hart, William L. (1948). "Dunham Jackson 1888-1946". Bull. Amer. Math. Soc. 54 (9): 847–860. MR 1565085.
- MAA presidents: Dunham Jackson
- Shohat, J. (1931). "Dunham Jackson on Approximation". Bull. Amer. Math. Soc. 37 (7): 501–505.
- Moore, C. N. (21 August 1942). "THE FOURIER SERIES: Fourier Series and Orthogonal Polynomials by Dunham Jackson". Science (N.S.) 96 (2486): 183–184. doi:10.1126/science.96.2486.183.
- O'Connor, John J.; Robertson, Edmund F., "Dunham Jackson", MacTutor History of Mathematics archive, University of St Andrews.
- Dunham Jackson at the Mathematics Genealogy Project.
- Jackson's photo at Mathematical Association of America site.
- Another (bigger one) photo of Jackson at History of Approximation Theory site.
- National Academy of Sciences Biographical Memoir