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zroots
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zroots(a)
returns the vector of (complex) roots of the (complex)
polynomial: Sum(a(i)*x^(i-1)) using Laguerre's method.
The roots are sorted in order of increasing real parts. Call with
non-zero imsort keyword to sort into increasing imaginary parts.
See Numerical Recipes (Press, et. al., Cambridge Univ. Press 1988),
section 9.5.
interpreted function, defined at i/zroots.i line 10
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