Raphael Bombelli (1526-1572) was an Italianmathematician. Events January 14 - Treaty of Madrid. ... Events January 16 - Thomas Howard, 4th Duke of Norfolk is tried for treason for his part in the Ridolfi plot to restore Catholicism in England. ... A mathematician is a person whose area of study and research is mathematics. ...
Born in Bologna, he is the author of a treatise on algebra and is a central figure in the understanding of imaginary numbers. Bologna (from Latin Bononia, Bulåggna in the local dialect) is the capital city of Emilia-Romagna in northern Italy, between the Po River and the Apennines. ... Algebra is a branch of mathematics which studies structure and quantity. ... In mathematics, an imaginary number (or purely imaginary number) is a complex number whose square is a negative real number. ...
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