Bao Châu Ngô

Abstract:   The fundamental lemma which was a conjecture stated precisely by Langlands and Shelstads in the 80', is an identity of orbital integrals on p-adic reductive groups. Its recent proof depends upon the beautiful geometry of a particular algebraic integrable system which was discovered by Hitchin. I will explain how this fibration helps to prove the fundamental lemma.

Here are some directions to Northeastern University. Lake Hall and Nightingale Hall can be best accessed from the entrance on the corner of Greenleaf Street and Leon Street. The two halls are connected, with no well-defined boundary in between. In particular, 509 Lake Hall is on the same corridor as 544 Nightingale Hall.

There is free parking available for people coming to the Colloquium at Northeastern's visitor parking (Rennaisance Garage). The entrance is from Columbus Avenue. If coming by car, you should park there and take the parking talon. After the lecture, you may pick up the payment coupon from Andrei Zelevinsky.