10#ifndef TLAPACK_LAHQR_EIG22_HH
11#define TLAPACK_LAHQR_EIG22_HH
33template <TLAPACK_SCALAR T>
void lahqr_eig22(T a00, T a01, T a10, T a11, complex_type< T > &s1, complex_type< T > &s2)
Computes the eigenvalues of a 2x2 matrix A.
Definition lahqr_eig22.hpp:34
Sort the numbers in D in increasing order (if ID = 'I') or in decreasing order (if ID = 'D' ).
Definition arrayTraits.hpp:15
typename traits::real_type_traits< Types..., int >::type real_type
The common real type of the list of types.
Definition scalar_type_traits.hpp:113
constexpr real_type< T > abs1(const T &x)
1-norm absolute value, |Re(x)| + |Im(x)|
Definition utils.hpp:133