PLASMA  2.8.0
PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures
void CORE_slaed0_betaapprox ( int  subpbs,
const int *  subpbs_info,
float *  D,
const float *  E 
)

CORE_slaed0_betaapprox - compute the rank-1 approximation for each subproblem. When a larger problem is split into two subproblems, the last diagonal element of the first subproblem and the first diagonal element of the second subproblem are set to D[i]-E[i+1]

Parameters
[in]subpbsspecifies the number of merge to be done at the leaf of the tree
[in]subpbs_infosubpbs_info[i] is the position of the first eigenvalue of the ith eigenproblem.
[in,out]DOn entry, D contains the diagonal elements of the two submatrices to be merged. On exit, D contains the updated rank-1 approximated diagonal elements.
[in]EE contains the extra-diagonal elements of the two submatrices to be merged.