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Paolo Ruffini
1765Sep, 22

Paolo Ruffini

Paolo Ruffini, Italian mathematician and philosopher (d. 1822)
Paolo Ruffini (22 September 1765 – 10 May 1822) was an Italian mathematician and philosopher.

By 1788 he had earned university degrees in philosophy, medicine/surgery and mathematics. His works include developments in algebra:

an incomplete proof (Abel–Ruffini theorem) that quintic (and higher-order) equations cannot be solved by radicals (1799),

Ruffini's rule which is a quick method for polynomial division,

contributions to group theory.He also wrote on probability and the quadrature of the circle.

He was a professor of mathematics at the University of Modena and a medical doctor including scientific work on typhus.

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Events on 1765

  • 9Mar

    Jean Calas

    After a campaign by the writer Voltaire, judges in Paris posthumously exonerate Jean Calas of murdering his son. Calas had been tortured and executed in 1762 on the charge, though his son may have actually committed suicide.
  • 22Mar

    Stamp Act 1765

    The British Parliament passes the Stamp Act that introduces a tax to be levied directly on its American colonies.
  • 24Mar

    Quartering Act

    Great Britain passes the Quartering Act, which requires the Thirteen Colonies to house British troops.