Trinity Rep launches its 40th anniversary season with the most acclaimed drama of recent years, David Auburn’s Pulitzer Prize-winning play, Proof. Catherine, an enigmatic 25-year-old, has sacrificed her studies to care for her father, a mathematician whose genius has recently given way to madness. The professor’s protégé finds something shocking in the great man’s notebooks just as Catherine’s older sister arrives with big plans for her. Proof celebrates the joy of discovery – of knowledge, truth and love.