The substitution of 
for 
in a polynomial 
. 
is then plotted as a function of 
for a given 
in the complex plane. By
varying 
so that the curve passes through the
origin, it is possible to determine a value for one root of the polynomial.
Isograph
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Cite this as:
Weisstein, Eric W. "Isograph." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Isograph.html