John Gerolamo Saccheri


Giovanni Gerolamo Saccheri (born 5 September 1667 in San Remo, Italy, died October 25, 1733 in Milan) is a Jesuit and mathematician.

He entered the Order at the age of 18. In 1690 he went to study in Milan, where he also studied mathematics, in addition to philosophy and theology, encouraged by Tomasso Ceva, his brother Giovanni Ceva. In 1694 he was ordained a priest.

From 1697 until his death he lectured on philosophy, theology and mathematics at the University of Pavia. Shortly before his death he published Euclides ab omni noevo vindicatus (free translation: Euclidean geometry free of errors), which is considered to be the first work devoted to non-Euclidean geometry. Saccheri attempted to prove Euclid's axiom of straight lines parallel to the contradiction, but the results were the first statements of hyperbolic geometry. In the so-called Saccheri quadrangle, he considered hypotheses of the acute angle, straight and open. He proved the falsehood of the open angle hypothesis and the equivalence of the straight line hypothesis with Euclid's axiom. After making a mistake in reasoning he came to the conclusion that the acute angle hypothesis is false. His results were later proved by Legendre. The work overtook its epoch and was lost, and it was discovered again by Eugenio Beltrami. Authoritative control (person):

wiki

Comments

Popular posts from this blog

Association of Jewish handicrafts "Jad Charuzim"

Grouping Red Arrows

Catechism of Polish Child