Giovanni Girolamo Saccheri

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Saccheri, Giovanni Girolamo

 

Born Sept. 5, 1667, in San Remo; died Oct. 25, 1733, in Milan. Italian scientist. Jesuit.

Saccheri taught theology and mathematics at Jesuit colleges in Turin, Pavia, and Milan. He attempted to prove Euclid’s parallel postulate by denying it and seeking a resulting contradiction, but his efforts were doomed to failure (seeLOBACHEVSKIAN GEOMETRY). Saccheri derived some theorems that were rediscovered by A. Legendre, and he in effect discovered some basic propositions of non-Euclidean geometry.

WORKS

Euclides ab omni naevo vindicatus; sive conatus geometricus quo stabiliun-turprima ipsa universaegeometriaeprincipia. Milan, 1733.
References in periodicals archive ?
Antes de Lambert y de Taurinus, se puede considerar como un precursor de las ideas no euclidianas al italiano Gerolamo Saccheri. En efecto, Saccheri considero un cuadrilatero birrectangulo en el cual los lados perpendiculares a la base son iguales y, por consiguiente, los otros dos angulos son iguales; examino las tres hipotesis relativas a estos angulos, a saber: que fueran rectos, agudos u obtusos.
[99] Bonoia, B.--I teoremi del Padre Gerolamo Saccheri sulla somma degli angoli di un triangolo e la ricerche di M.
Posiblemente ese provinciano universal llamado Inmanuel Kant no conocio nunca a Gerolamo Saccheri, un jesuita italiano nacido en 1667 que invento, sin saberlo, una geometria diferente a la de Euclides.