Antoine Arnauld, French mathematician, theologian, and philosopher (d. 1694)

Antoine Arnauld (6 February 1612 – 8 August 1694) was a French Catholic theologian, philosopher and mathematician. He was one of the leading intellectuals of the Jansenist group of Port-Royal and had a very thorough knowledge of patristics. Contemporaries called him le Grand to distinguish him from his father.