Calculations on the edge of sanity in this eye-opening 'Proof'
You may well think you have seen David Auburn's "Proof," the story of a single, 25-year-old Hyde Park woman grieving for the mathematically brilliant father who has left her bereft. The Broadway national tour came through Chicago. There was a very solid production at the Goodman Theatre, featuring an African-American cast. And there was the 2005 John Madden movie, starring Gwyneth Paltrow and Anthony Hopkins. But dir…