András Vasy (born 1969) is a Hungarian–American mathematician working in the areas of partial differential equations, microlocal analysis, scattering theory, and inverse problems.

[2] Vasy grew up in Budapest and attended Apáczai Csere János Gimnázium of the Eötvös Loránd University (ELTE).

[9][1] The unifying feature of Vasy's work is the application of tools from microlocal analysis to problems in hyperbolic partial differential or pseudo-differential equations.

He analyzed the propagation of singularities for solutions of wave equations on manifolds with corners[10] or more complicated boundary structures, partially in joint work with Richard Melrose and Jared Wunsch.

This paper led to further advances, including the proof, by Vasy and Peter Hintz, of the global nonlinear stability of the Kerr-de Sitter family of black hole spacetimes,[13] and a new proof of Smale's conjecture for Anosov flows by Semyon Dyatlov and Maciej Zworski.