Hello,
Does someone have a routine for a quartic polynomial root solver? I need
to find the smalles real positive root of a quartic polynomial or know
that it does not exist. In cases when it does exist, it is likely that I
have a very good initial guess just by solving the corresponding quadratic
equation (ignoring two terms, since they are small!), but simply deciding
whether there is a positive real root seems hard (Sturm sequences?). The
code will be used in public-domain libraries.
Any advice from the experiences appreciated.
Snowed-In Aleksandar
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