Georg-August-Universität Göttingen

Institute of Theoretical Physics

Condensed Matter / A. Honecker / Householder

OpenMP implementation of the Householder reduction

Presentation at ParCo2007

• Slides (PDF) of the talk given by Andreas Honecker
• Contribution to the proceedings: A. Honecker, J. Schüle, OpenMP Implementation of the Householder Reduction for Large Complex Hermitian Eigenvalue Problems, first version: July 31, 2007, this version: September 24, 2007

Supplementary material for this contribution

• Code fragment with a C99 implementation of the Householder reduction for a complex Hermitian matrix: householder-c99.c

Test matrices:

• ``Small matrix'' (dimension 1184): source version: SmallMatrix.gz, evaluated version: SmallMatrix.asc.gz
• ``Large matrix'' (dimension 41835): source version: LargeMatrix.gz, evaluated version: LargeMatrix.asc.gz (compressed files, approx. 4.5MByte each)

These are sparse matrices. Therefore we store only the non-zero entries. Otherwise we hope that the files are self-explanatory.

---

September 24, 2007; -- don't send me spam!