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| author | julie <julielangou@users.noreply.github.com> | 2011-11-01 22:02:31 +0000 |
|---|---|---|
| committer | julie <julielangou@users.noreply.github.com> | 2011-11-01 22:02:31 +0000 |
| commit | d5c30c90bdecf38da1064e2ed52583634573e741 (patch) | |
| tree | 480fc5ff31ee14b83116b6428aad79ea6e89362d /SRC/dgges.f | |
| parent | 04670a68760fa27333f8bcef8172f71adc6880ef (diff) | |
| download | lapack-d5c30c90bdecf38da1064e2ed52583634573e741.tar.gz lapack-d5c30c90bdecf38da1064e2ed52583634573e741.tar.bz2 lapack-d5c30c90bdecf38da1064e2ed52583634573e741.zip | |
Never say never...
Diffstat (limited to 'SRC/dgges.f')
| -rw-r--r-- | SRC/dgges.f | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/SRC/dgges.f b/SRC/dgges.f index bc2c69ae..44b8f6b1 100644 --- a/SRC/dgges.f +++ b/SRC/dgges.f @@ -116,8 +116,7 @@ *> SELCTG(ALPHAR(j),ALPHAI(j),BETA(j)) is true; i.e. if either *> one of a complex conjugate pair of eigenvalues is selected, *> then both complex eigenvalues are selected. -*> \endverbatim -*> \verbatim +*> *> Note that in the ill-conditioned case, a selected complex *> eigenvalue may no longer satisfy SELCTG(ALPHAR(j),ALPHAI(j), *> BETA(j)) = .TRUE. after ordering. INFO is to be set to N+2 @@ -189,8 +188,7 @@ *> If ALPHAI(j) is zero, then the j-th eigenvalue is real; if *> positive, then the j-th and (j+1)-st eigenvalues are a *> complex conjugate pair, with ALPHAI(j+1) negative. -*> \endverbatim -*> \verbatim +*> *> Note: the quotients ALPHAR(j)/BETA(j) and ALPHAI(j)/BETA(j) *> may easily over- or underflow, and BETA(j) may even be zero. *> Thus, the user should avoid naively computing the ratio. @@ -239,8 +237,7 @@ *> The dimension of the array WORK. *> If N = 0, LWORK >= 1, else LWORK >= 8*N+16. *> For good performance , LWORK must generally be larger. -*> \endverbatim -*> \verbatim +*> *> If LWORK = -1, then a workspace query is assumed; the routine *> only calculates the optimal size of the WORK array, returns *> this value as the first entry of the WORK array, and no error |