PLASMA
2.8.0
PLASMA - Parallel Linear Algebra for Scalable Multi-core Architectures
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void CORE_slaed3_computeW | ( | int | n, |
int | K, | ||
const float * | Q, | ||
int | LDQ, | ||
const float * | DLAMBDA, | ||
float * | W, | ||
const int * | INDX, | ||
int | start, | ||
int | end | ||
) |
CORE_slaed2_computeK - Computes the number of deflated eigenvalues of a symmetric tridiagonal matrix. A eigenvalue is deflated if it's close enough to another eigenvalue or if the vector Z contains a tiny entry. This operation is useful when two subproblems, which were previously solved, are merge into a larger problem.
[in] | n | n specifies the dimension of the symmetric tridiagonal matrix |
[in] | K | K specifies the number of non-deflated eigenvalues |
[in] | Q | On entry, Q contains the eigenvectors after slaed4 |
[in] | LDQ | LDQ specifies the leading direction of Q |
[in] | DLAMBDA | DLAMBDA contains a copy of the first K eigenvalues |
[out] | W | W |
[out] | INDX | The permutation used to sort the contents of DLAMBDA into ascending order |
[in] | start | start specifies the first column index to be considered by this kernel |
[in] | end | end specifies the last column index to be considered by this kernel note that this index can be > n, it is supported |