|
Viewing Issue Advanced Details
[ Jump to Notes ]
|
[ View Simple ]
[ Issue History ]
[ Print ]
|
|
ID |
Category |
Severity |
Reproducibility |
Date Submitted |
Last Update |
|
0000419 |
[ALGLIB] Linear algebra |
minor |
have not tried |
2011-12-22 11:52 |
2011-12-22 11:53 |
|
|
Reporter |
SergeyB |
View Status |
public |
|
|
Assigned To |
SergeyB |
|
Priority |
normal |
Resolution |
fixed |
Platform |
|
|
Status |
resolved |
|
OS |
|
|
Projection |
none |
|
OS Version |
|
|
ETA |
none |
Fixed in Version |
3.5.0 |
Product Version |
|
| |
Target Version |
|
Product Build |
|
|
|
Summary |
0000419: FIXED: inconvergence of the low-accuracy version of bidiagonal SVD |
|
Description |
Bidiagonal QR SVD provided by LAPACK has two version - high accuracy but slow one (TOL>0), and moderate accuracy but quick one (TOL<0). Quick version in some very rare circumstances fails to converge.
Currently it is unknown whether it is bug or intrinsic property of the algorithm. In order to make all SVD-dependent algorithms more stable quick version is silently replaced by the slower, but more robust one. |
|
Steps To Reproduce |
|
|
Additional Information |
|
|
|
Programming language |
Unspecified |
|
|
Attached Files |
|
|
|
Relationships 
