# 2019 Christopher Heyde Medal

Three days ago the Australian Academy of Sciences announced the recipients of its 2019 Honorific Awards (Twitter, Webpage). Among them is Professor Geordie Williamson FAA FRS (Wikipedia), Mathematician at the University of Sydney (Homepage), who receives the Christopher Heyde Medal.

The Australian Academy of Sciences states:

Professor Williamson is a world leader in the field of geometric representation theory. Among his many breakthrough contributions are his proof, together with Ben Elias, of Soergel's conjecture—resulting in a proof of the Kazhdan-Lusztig positivity conjecture from 1979; his entirely unexpected discovery of counter-examples to the Lusztig and James conjectures; and his new algebraic proof of the Jantzen conjectures.