Jakob Bernoulli met Robert Boyle and Robert Hooke on a trip to England in 1676, after which he devoted his life to science and mathematics. He lectured at the University of Basel from 1682, becoming Professor of Mathematics in 1687.
His masterwork was Ars Conjectandi (the Art of Conjecturing), a groundbreaking work on probability theory. It was published eight years after his death in 1713 by his nephew Nicholas. The terms Bernoulli trial and Bernoulli Numbers result from this work, and are named after him.
JacobBernoulli was the brother of Johann Bernoulli and the uncle of Daniel Bernoulli.
Jacob probably felt that Johann was the more powerful mathematician of the two and, this hurt since Jacob's nature meant that he always had to feel that he was winning praise from all sides.
JacobBernoulli continued to hold the chair of mathematics at Basel until his death in 1705 when the chair was filled by his brother Johann.
JacobBernoulli was appointed professor of mathematics in Basel in 1687 and the two brothers began to study the calculus as presented by Leibniz in his 1684 paper on the differential calculus in Nova Methodus pro Maximis et Minimis, itemque Tangentibus...
JacobBernoulli's first important contributions were a pamphlet on the parallels of logic and algebra published in 1685, work on probability in 1685 and geometry in 1687.
Jacob had always found the properties of the logarithmic spiral to be almost magical and he had requested that it be carved on his tombstone with the Latin inscription "Eadem Mutata Resurgo" meaning "I shall arise the same though changed".