NumaWWW: Numerical Mathematics in the World Wide Web

Zeroes of complex polynomials - Method of Jenkins and Traub

Please specify the degree n of p:

n = Important: 1 <= n <= 50 !

zeroes specified
Type here the n zeroes, in any order. You must write the complex numbers as pairs in parentheses, separated by comma.
(1,2),(0,1),(0,1.1)
input of coefficients
You must type the coefficients as complex numbers in this textarea, beginning with the leading coefficient. You must write the complex numbers as pairs in parentheses, separated by comma. The prepared case is for x³-6 x² +11 x -6 .
(1,0),(-6,0),(11,0),(-6,0)

Do you want a contour plot of |p|?

contour plot:
You need to specify a parameter for the bounding box b >= 0.1,
|p| will be shown over the area
[re_min-b,re_max+b] x [im_min-b,im_max+b],
where re/im_min, re/im_max are the minimal resp. maximal real and imaginary part of the zeroes.
b =

No contourplot

Click on "evaluate", in order to submit your input.

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23.06.2010

zeroes specified	Type here the n zeroes, in any order. You must write the complex numbers as pairs in parentheses, separated by comma. (1,2),(0,1),(0,1.1)
input of coefficients	You must type the coefficients as complex numbers in this textarea, beginning with the leading coefficient. You must write the complex numbers as pairs in parentheses, separated by comma. The prepared case is for x³-6 x² +11 x -6 . (1,0),(-6,0),(11,0),(-6,0)

	contour plot: You need to specify a parameter for the bounding box b >= 0.1, \|p\| will be shown over the area [re_min-b,re_max+b] x [im_min-b,im_max+b], where re/im_min, re/im_max are the minimal resp. maximal real and imaginary part of the zeroes. b =
	No contourplot