When visiting graduate student Gianmarco Caldini first arrived at IAS in spring 2024, a series of fortuitous connections on the Institute campus and beyond led him and Camillo De Lellis, IBM von Neumann Professor in the School of Mathematics, to both a collaboration and a friendship with renowned topologist and frequent IAS Member Bill Browder. Their work resulted in the publication of a decades-old theorem originally begun by Browder and Frederick J. Almgren Jr.
