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/**

\name Find eigensolutions of a symmetric real matrix.

This function accepts a real symmetric matrix Q and a vector b.

When the function returns, the eigenvalues of the matrix Q will be stored in b and

the eigenvectors form the columns of Q. This function is based on the

Lapack function dsyev, and returns its info code. A code of 0 indicates

success, and a code < 0 indicates an error. Probably Q is not a real symmetric matrix.

If the code is > 0 "the algorithm failed  to  converge;  code  off-diagonal  elements  

of an intermediate tridiagonal form did not converge to zero." Presumably this means that 

code contains the number of eigenvalues which are ok. 

\author Andreas B¾rentzen.

*/

//@{

int EigenSolutionsSym(CMatrix& Q, CVector& b);

//@}