New York City
Both wonderfully funny and powerfully moving, Proof examines the lives of four people as they converge over one weekend for the funeral of Robert, a brilliant yet mentally-unstable mathematician. Catherine, the daughter who has been caring for him alone for years, must grapple with the arrival of her well-meaning but pragmatic sister Claire as well as the attentions of Hal, Robert’s former grad student who hopes to find traces of his mentor’s genius in the 103 notebooks he left behind. When a book containing a revolutionary mathematical proof is discovered, Catherine must face the ultimate question: How much of her father’s genius – or madness – did she inherit after all?