Class quartic_real_gsl2 (o2scl)¶
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class
o2scl
::
quartic_real_gsl2
: public o2scl::quartic_real¶ Solve a quartic with real coefficients and real roots (GSL)
This class directly solves resolvent cubic and associated quadratics without using the GSL functions (as done in quartic_real_gsl).
- Idea for Future:
Optimize value of
cube_root_tol
and compare more clearly to o2scl::quartic_real_gsl
Public Functions
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quartic_real_gsl2
()¶
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~quartic_real_gsl2
()¶
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int
solve_r
(const double a4, const double b4, const double c4, const double d4, const double e4, double &x1, double &x2, double &x3, double &x4)¶ Solves the polynomial \( a_4 x^4 + b_4 x^3 + c_4 x^2 + d_4 x + e_4= 0 \) giving the four real solutions \( x=x_1 \) , \( x=x_2 \) , \( x=x_3 \) , and \( x=x_4 \) .
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const char *
type
()¶ Return a string denoting the type (“quartic_real_gsl2”)
Public Members
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double
cube_root_tol
¶ A tolerance for determining the proper cube root (default \( 10^{-7} \) )