**Isaac Barrow** He was an English mathematician and theologian, credited for his discoveries in the area of modern calculus. He was born in 1630 in London and died in the same city on May 4, 1677 at the age of 46. He became a religious minister and taught mathematics, but did not gain due recognition for his discoveries in modern calculus. Orphan (1634) of mother Ann was sent by her father, Thomas Barrow, to be raised by grandfather William Buggin. After two years, his father remarried and resumed his care, giving him a refined education at Charterhouse and then Felstead School.

With his father's bankruptcy because of the war, he was admitted as a scholar at the Peterhouse School in Cambridge (1643) for his great potential. Then he went to Oxford and then to London. Isaac enrolled in 1646 at Trinity College in Oxford and graduated in 1649. He was a teacher at a classical school and began studying mathematics and encouraging people to help foundations for math students. In 1652, he obtained his academic degree and defended the importance of studying Greek, literature, and Latin at the university to provide a firm foundation for learning as well as modern languages such as French, Spanish and Italian, mathematics, and science.

He began studying theology and was appointed to the post of *lectureship* in a college and later was appointed professor of geometry at Gresham College in London (1662) and Cambridge (1664), whose chair was succeeded by his disciple, by his appointment, Isaac Newton, when he became chaplain of Charles II in London (1669). He edited several works of the ancient Greeks such as Euclid, Apollonius and Archimedes and his own as Lectiones opticae (1669) and Lectiones geometriae (1670), both of them already aided by Newton. Barrow contracted a fever in 1677 in London. He tried to use opium to cure himself, for this drug had already healed him once in Constantinople. However, he died a few days later at Westminster Abbey.