Jacob Bernoulli

lived from 1654 to 1705

Jacob Bernoulli was a Swiss mathematician who was the first to use the term integral. He studied the catenary, the curve of a suspended string. He was an early user of polar coordinates and discovered the isochrone.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Bernoulli_Jacob.html