In algebra, a Bring radical or ultraradical of a complex number a is a root of the polynomial
(The root is chosen so the radical of a real number is real, and the radical is a differentiable function of a in the complex plane, with a branch cut along the negative real line below −1. See the "Bring radicals" section below.)
George Jerrard (1804–1863) showed that some quintic equations can be solved using radicals and Bring radicals, which had been introduced by Erland Bring (1736–1798). They can be used to obtain closed-form solutions of quintic equations.
Famous quotes containing the words radical and/or bring:
“A radical is one of whom people say He goes too far. A conservative, on the other hand, is one who doesnt go far enough. Then there is the reactionary, one who doesnt go at all. All these terms are more or less objectionable, wherefore we have coined the term progressive. I should say that a progressive is one who insists upon recognizing new facts as they present themselvesone who adjusts legislation to these new facts.”
—Woodrow Wilson (18561924)
“We bring [to government] no hereditary status or gift of infallibility and none follows us from this place.”
—Gerald R. Ford (b. 1913)