‘Four Saints in Three Acts” by Virgil Thomson and Gertrude Stein is not for the fainthearted or mathematically exacting.The deliberately bizarre experimental opera features not what the title says, but many saints in one or four acts — depending how viewers count — and Stein herself making fun of the situation by having characters in the opera ask, “How many saints?”Last seen locally in a San Francisco Opera Center production 40 years ago, the 1934 “Four Saints” comes this wee Read More