# User-Guide

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{\Huge\textbf{PETSc/TAO Users Manual}}
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**Argonne National Laboratory**

**Mathematics and Computer Science Division**

______________________________________________________________________

Prepared by

**S. Balay** {sup}`1`,
**S. Abhyankar** {sup}`1,2`,
**M. F. Adams** {sup}`3`,
**S. Benson** {sup}`1`,
**J. Brown** {sup}`1,10`,
**P. Brune** {sup}`1`,
**K. Buschelman** {sup}`1`,
**E. M. Constantinescu** {sup}`1`,
**L. Dalcin** {sup}`4`,
**A. Dener** {sup}`1`,
**V. Eijkhout** {sup}`6`,
**J. Faibussowitsch** {sup}`1,18`,
**W. D. Gropp** {sup}`1,18`,
**V. Hapla** {sup}`8`,
**T. Isaac** {sup}`1,14`,
**P. Jolivet** {sup}`12,22`,
**D. Karpeev** {sup}`1`,
**D. Kaushik** {sup}`1`,
**M. G. Knepley** {sup}`1,9`,
**F. Kong** {sup}`1,11`,
**S. Kruger** {sup}`15`,
**D. A. May** {sup}`7,21`,
**L. Curfman McInnes** {sup}`1`,
**R. Tran Mills** {sup}`1`,
**L. Mitchell** {sup}`13,20`,
**T. Munson** {sup}`1`,
**J. E. Roman** {sup}`16`,
**K. Rupp** {sup}`1,19`,
**P. Sanan** {sup}`1,8`,
**J. Sarich** {sup}`1`,
**B. F. Smith** {sup}`1,17`,
**H. Suh** {sup}`1`,
**S. Zampini** {sup}`4`,
**H. Zhang** {sup}`1,5`,
**H. Zhang** {sup}`1`, and
**J. Zhang** {sup}`1`

{sup}`1` Mathematics and Computer Science Division, Argonne National Laboratory

{sup}`2` Electricity Infrastructure and Buildings Division, Pacific Northwest National Laboratory

{sup}`3` Computational Research, Lawrence Berkeley National Laboratory

{sup}`4` Extreme Computing Research Center, King Abdullah University of Science and Technology

{sup}`5` Department of Computer Science, Illinois Institute of Technology

{sup}`6` Texas Advanced Computing Center, University of Texas at Austin

{sup}`7` Department of Earth Sciences, University of Oxford

{sup}`8` Institute of Geophysics, ETH Zurich

{sup}`9` Department of Computer Science and Engineering, University at Buffalo

{sup}`10` Department of Computer Science, University of Colorado, Boulder

{sup}`11` Computational Frameworks, Idaho National Laboratory

{sup}`12` Sorbonne Université, CNRS, LIP6

{sup}`13` NVIDIA Corporation

{sup}`14` College of Computing, Georgia Tech

{sup}`15` Tech-X Corporation

{sup}`16` DSIC, Universitat Politècnica de València

{sup}`17` Flatiron Institute, Simons Foundation

{sup}`18` University of Illinois, Urbana-Champaign

{sup}`19` Institute for Microelectronics, TU Wien

{sup}`20` Department of Computer Science, Durham University

{sup}`21` Scripps Institution of Oceanography, University of California, San Diego

{sup}`22` Toulouse INP, CNRS, Institute of Computer Science Research

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{\bf \today}
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______________________________________________________________________

This work was supported by the Office of Advanced Scientific Computing Research,
Office of Science, U.S. Department of Energy, under Contract DE-AC02-06CH11357.

______________________________________________________________________

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```{toctree}
:maxdepth: 3

introduction
programming
dm
additional
```