Mathematician:Paolo Ruffini

Italian mathematician and philosopher.

Most famous for his incomplete proof of what is now known as the Abel-Ruffini Theorem proving the insolubility of the general quintic with radicals.

Nationality
Italian

History

 * Born: 22 Sept 1765 in Valentano, Papal States (now Italy)
 * Died: 10 May 1822 in Modena, Duchy of Modena (now Italy)

Theorems and Definitions

 * Abel-Ruffini Theorem (with )
 * Ruffini's Rule

Books and Papers

 * 1799: La teoria generale delle equazioni in cui è provato che la soluzione algebrica di equazioni di grado maggiore di 4 è impossibile (The general theory by which it is proved that the solution of algebraic equations of order greater than 4 is impossible)
 * 1802: Riflessioni intorno alla rettificazione ed alla quadratura del circulo (on squaring the circle)
 * 1802: Della soluzione delle equazioni algebraiche determinata partocolari di grado sup. al 4º (The solution of particular equations whose order is greater than 4)
 * 1804: Sopra la determinazione delle radici nelle equazioni numeriche di qualunque grado
 * 1806: Della immortalità dell'anima (On the immortality of the soul)
 * 1807: Algebra elementare (Elementary algebra)
 * 1820: Memoria sul tifo contagioso (Memoir on contagious typhus)
 * 1821: Riflessioni critiche sopra il saggio filosofico intorno alle probabilità del signor conte Laplace (Critical review on the philosophical writing of on probability)

My Italian is not good - I may have mistranslated or misinterpreted some of the above.

Also see

 * : Introduction
 * : Where to begin...