Benjamin Peirce, April 4, 1809 – October 6, 1880) was an American mathematician who taught at Harvard University for forty years. He made contributions to celestial mechanics, number theory, algebra, and the philosophy of mathematics. After graduating from Harvard, he became a tutor there (1829), then was appointed professor of mathematics in 1831. He added astronomy to his portfolio in 1842, and remained as Harvard professor until his death. Wikipedia
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