Proof By David Auburn

A play about love, loss and mental illness, Proof is one of the most acclaimed productions of this century.

Hal, a student of the recently deceased maths professor Robert, discovers a ground-breaking mathematical proof in Robert's old office. The struggle is on to find out who wrote it.

Could it be Catherine, the daughter of Robert? She is mentally unstable, struggling to deal with the death of her genius father, and can't resist the advances of Hal.

'Intensely alive, funny, complex, human' (New York Magazine).