Luigi Guido Grandi

Luigi Guido Grandi ( born October 1, 1671 at Cremona, Italy, † July 4, 1742 in Pisa ) was an Italian mathematician and Camaldolese.

Grandi was educated at the Jesuit College in Cremona. In 1687, he became a member of the Camaldolese Order in Ferrara. 1693, he joined the Camaldolese Order in Rome. The following year he became a teacher of philosophy and theology at a monastery in Florence, from 1700 in Rome, later in Pisa.

With a trip to England in 1709 he was chosen by scientists there fellow of the Royal Society. 1714 Grandi was appointed professor of mathematics at the University of Pisa.

Grandi also dealt with the alternating infinite series and found that you can take the value zero or one, depending on the evaluation order. He ordered her then the value to and justified this on the geometric series:

This was a proof of how God created the world from nothing for him. Was introduced to today's mathematical theory of convergence as described by Augustin Louis Cauchy (1789-1857), the observed series is not convergent geometric series and the only valid.