naive_quartic_real Class Reference

#include <poly.h>

Inheritance diagram for naive_quartic_real:

quartic_real

Detailed Description

Solve a quartic with real coefficients and real roots.

Todo:
3/8/07 - Compilation at the NSCL produced non-finite values in solve_r() for some values of the coefficients. This should be checked.
Todo:
It looks like this code is tested only for a4=1, and if so, the tests should be generalized.
Todo:
Also, there is a hard-coded number in here ($ 10^{-6} $), which might be moved to a data member?

Definition at line 627 of file poly.h.


Public Member Functions

virtual 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)
const char * type ()
 Return a string denoting the type ("naive_quartic_real").

Member Function Documentation

virtual 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 
) [virtual]

Solves the polynomial $ a_4 x^4 + b_4 x^3 + c_4 x^2 + d_4 x + e_4 = 0 $ giving the four solutions $ x=x_1 $ , $ x=x_2 $ , $ x=x_3 $ , and $ x=x_4 $ .

Implements quartic_real.


The documentation for this class was generated from the following file:

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