Dave Bayer
Dave Bayer is american mathematician. He is currently professor of mathematics at Barnard College, Columbia University. He was math consultant for the movie "A Beautiful Mind", and also acted in it as one of the pen ceremony professors. He is also one of few people to have both Erdõs number and Bacon number. According to his homepage, sum of his Bacon and Erdõs numbers is 5. He was educated at Swarthmore College as an undergraduate.