Algebraical Researches, Containing a Disquisition on Newton's Rule for the Discovery of Imaginary Roots, and an Allied Rule Applicable to a Particular Class of Equations, Together with a Complete Invariantive Determination of the Character of the Roots of the General Equation of the Fifth Degree, c

J. J. Sylvester
1864 Philosophical Transactions of the Royal Society of London  
doi:10.1098/rstl.1864.0017 fatcat:bsmezi456fahdgh4rjb3fu3bx4