Bruce Lee Rothschild (born August 26, 1941) is a professor of mathematics at the University of California, Los Angeles specializing in combinatorial mathematics.
Rothschild was born in 1941 in Los Angeles. He got his Ph.D. from Yale University in 1967 under the supervision of Øystein Ore. Rothschild wrote several papers with Paul Erdős, giving him an Erdős number of 1.
Rothschild, together with Ronald Graham, formulated one of the most monumental results in Ramsey Theory, the Graham-Rothschild Parameter Sets Theorem. He has collaborated with American mathematicians Joel Spencer and Ronald Graham on key texts related to Ramsey Theory.
In 1971, he shared the Pólya Prize (SIAM) with four other mathematicians for his work on Ramsey theory. In 2012 he became a fellow of the American Mathematical Society.