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**Leonard James Rogers** FRS^{[1]} (30 March 1862, Oxford, England, – 12 September 1933, Oxford, England) was a British mathematician who was the first to discover the Rogers-Ramanujan identity and Hölder's inequality, and who introduced Rogers polynomials.^{[2]} The Rogers–Szegő polynomials are named after him.

From 1888 to 1919 he was Professor of Mathematics at the Yorkshire College (from 1904, the University of Leeds).

He was elected a fellow of the Royal Society in 1924. In the late 1920s, he published in The Mathematical Gazette four notes on geometrical problems, including on Malfatti's Problem.

- Rogers, L. J. (February 1888), "An extension of a certain theorem in inequalities",
*Messenger of Mathematics*, New Series**XVII**(10): 145–150, JFM 20.0254.02, archived from the original on August 21, 2007, http://www.archive.org/stream/messengermathem01unkngoog#page/n183/mode/1up. The first paper containing Hölder's inequality. - Rogers, L. J. (April 12, 1894), "Second Memoir on the Expansion of certain Infinite Products",
*Proceedings of the London Mathematical Society*, s1**25**(1): 318–343, doi:10.1112/plms/s1-25.1.318, JFM 25.0432.01, archived from the original on Unspecified Date, http://www.archive.org/stream/proceedingslond17socigoog#page/n332/mode/1up. The first paper containing the Rogers-Ramanujan identities.

**^**d., A. L. (1934). "**Leonard James Rogers**. 1862-1933".*Obituary Notices of Fellows of the Royal Society***1**(3): 299. doi:10.1098/rsbm.1934.0013. JSTOR 769431.**^**O'Connor, John J.; Robertson, Edmund F., "Leonard James Rogers",*MacTutor History of Mathematics archive*, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Rogers_James.html.