Liu Lu (; born 2 April 1989) is a professor of

mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...

at Central South University in

Changsha Changsha (; ; ; Changshanese pronunciation: (), Standard Mandarin pronunciation: ) is the capital and the largest city of Hunan Province of China. Changsha is the 17th most populous city in China with a population of over 10 million, an ...

Hunan Hunan (, ; ) is a landlocked province of the People's Republic of China, part of the South Central China region. Located in the middle reaches of the Yangtze watershed, it borders the province-level divisions of Hubei to the north, Jiangxi to ...

, where he is China's youngest full university Professor. As a 22-year-old undergraduate student Lu proved that Ramsey theorem for infinite graphs (the case n = 2) with 2-coloring does not imply WKL₀ over RCA₀, solving an open problem left by English logician David Seetapun in the 1990s (). For this he was instantly promoted to full professor in the department where he was studying, and awarded a prize of 1 million

renminbi The renminbi (; symbol: ¥; ISO code: CNY; abbreviation: RMB) is the official currency of the People's Republic of China and one of the world's most traded currencies, ranking as the fifth most traded currency in the world as of April 2022. ...

. Some established professors were critical of his appointment voicing concern that he was too young, had no teaching experience and that the appointment was mostly designed to get media attention to Liu's university.

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* {{DEFAULTSORT:Liu, Lu 1989 births Living people 21st-century Chinese mathematicians Academic staff of the Central South University Educators from Liaoning People from Dalian Mathematicians from Liaoning