Psi4
Namespaces | Macros | Functions
tred2.cc File Reference

Converts a symmetric matrix to tridiagonal form for use in tqli. More...

#include <cmath>

Namespaces

 psi
 This is all defined in python.cc initialize.
 

Macros

#define DSIGN(a, b)   ((b) >= 0.0) ? (fabs(a)) : (-fabs(a))
 

Functions

void psi::tred2 (int n, double **a, double *d, double *e, int matz)
 

Detailed Description

Converts a symmetric matrix to tridiagonal form for use in tqli.

Macro Definition Documentation

#define DSIGN (   a,
 
)    ((b) >= 0.0) ? (fabs(a)) : (-fabs(a))