They're larger-than-life, and somehow on stage they still are. In "Proof" David Auburn's Tony- and Pulitzer Prize-winning play, Don Cheadle plays a mathematical genius with mental health issues; Ayo Edebiri plays his daughter, with issues of her own. This is the first time they've ever worked together. Edebiri said she was "very happy" when she was presented with the prospect of working with Cheadle: "He's on, like, my Mount Rushmore of actors." Cheadle says the two share a father-daughter