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Isaac Barrow was an English mathematician and theologian who spent the majority of his academic career at Cambridge University. He was a Fellow of Trinity College, Cambridge, from 1648 to 1662, and Master of Trinity College from 1662 to 1669. He was also a Lucasian Professor of Mathematics from 1663 to 1669, and a Regius Professor of Divinity from 1669 to 1675.