===============
PETSc |version|
===============
PETSc, the Portable, Extensible Toolkit for Scientific Computation,
pronounced PET-see (`/ˈpɛt-siː/ <https://en.wikipedia.org/wiki/Help:IPA/English#Key>`__), is a suite of
data structures and routines for the scalable (parallel) solution of scientific
applications modeled by partial differential equations. It supports MPI, and GPUs through
CUDA, HIP or OpenCL, as well as hybrid MPI-GPU parallelism; it also supports the NEC-SX Tsubasa Vector Engine. PETSc (sometimes called PETSc/TAO)
also contains the TAO, the Toolkit for Advanced Optimization, software library.

PETSc is developed as :ref:`open-source <doc_license>`, requests and contributions are welcome.

News
====
.. admonition:: News: New Book on PETSc

  **PETSc for Partial Differential Equations: Numerical Solutions in C and Python**, by Ed Bueler, is available.

  - `Book from SIAM Press <https://my.siam.org/Store/Product/viewproduct/?ProductId=32850137>`__
  - `Google Play E-book <https://play.google.com/store/books/details/Ed_Bueler_PETSc_for_Partial_Differential_Equations?id=tgMHEAAAQBAJ>`__

.. admonition:: News: New paper on PETSc community

  `The Community is the Infrastructure  <https://arxiv.org/abs/2201.00967>`__

.. admonition:: News: Paper on PETSc communication System

  `The PetscSF Scalable Communication Layer <https://ieeexplore.ieee.org/document/9442258>`__

.. admonition:: News: Paper on PETSc usage with GPUs

  `Toward Performance-Portable PETSc for GPU-based Exascale Systems <https://www.sciencedirect.com/science/article/pii/S016781912100079X>`__


Main Topics
===========

.. toctree::
   :maxdepth: 1

   Overview <overview/index>
   Download <download/index>
   Installation <install/index>
   FAQ <faq/index>
   Documentation <docs/index>
   Tutorials <tutorials/index>
   Community <community/index>
   Developers <developers/index>
   Misc. <miscellaneous/index>

Toolkits/libraries that use PETSc
==========================================

-  `ADflow <https://github.com/mdolab/adflow>`__ An Open-Source
   Computational Fluid Dynamics Solver for Aerodynamic and
   Multidisciplinary Optimization
-  `BOUT++ <https://boutproject.github.io>`__ Plasma simulation
   in curvilinear coordinate systems
-  `Chaste <https://www.cs.ox.ac.uk/chaste/>`__ Cancer, Heart and
   Soft Tissue Environment
-  `code_aster <https://www.code-aster.org/V2/spip.php?rubrique2​>`__
   open source general purpose finite element code for solid and
   structural mechanics
-  `COOLFluiD <https://github.com/andrealani/COOLFluiD>`__ CFD,
   plasma and multi-physics simulation package
-  `DAFoam <https://dafoam.github.io>`__ Discrete adjoint solvers
   with `OpenFOAM <https://openfoam.com>`__ for aerodynamic
   optimization
-  `DEAL.II <https://www.dealii.org/>`__ C++ based finite element
   simulation package
-  `DUNE-FEM <https://dune-project.org/sphinx/content/sphinx/dune-fem/>`__ Python and C++ based finite element simulation package      
-  `FEniCS <https://fenicsproject.org/>`__ Python based finite
   element simulation package
-  `Firedrake <https://www.firedrakeproject.org/>`__ Python based
   finite element simulation package
-  `Fluidity <https://fluidityproject.github.io/>`__ a finite
   element/volume fluids code
-  `FreeFEM <https://freefem.org/>`__ finite element PDE solver
   with embedded domain specific language
-  `hIPPYlib <https://hippylib.github.io>`__ FEniCS based toolkit
   for solving large-scale deterministic and Bayesian inverse
   problems governed by partial differential equations
-  `libMesh <https://libmesh.github.io>`__ adaptive finite element
   library
-  `MFEM <https://mfem.org/>`__ lightweight, scalable C++ library
   for finite element methods
-  `MLSVM <https://github.com/esadr/mlsvm>`__, Multilevel Support
   Vector Machines with PETSc.
-  `MoFEM <http://mofem.eng.gla.ac.uk/mofem/html>`__, An open
   source, parallel finite element library
-  `MOOSE - Multiphysics Object-Oriented Simulation
   Environment <https://mooseframework.inl.gov/>`__ finite element
   framework, built on top of libMesh and PETSc
-  `OOFEM <http://www.oofem.org>`__ object oriented finite element
   library
-  `OpenCarp <https://opencarp.org/>`__ Cardiac Electrophysiology Simulator
-  `OpenFOAM <https://develop.openfoam.com/modules/external-solver>`__
   Available as an extension for linear solvers for OpenFOAM
-  `OpenFVM <http://openfvm.sourceforge.net/>`__ finite volume
   based CFD solver
-  `PermonSVM <http://permon.vsb.cz/permonsvm.htm>`__ support
   vector machines and
   `PermonQP <http://permon.vsb.cz/permonqp.htm>`__ quadratic
   programming
-  `PetIGA <https://bitbucket.org/dalcinl/petiga/>`__ A framework
   for high performance Isogeometric Analysis
-  `PHAML <https://math.nist.gov/phaml/>`__ The Parallel
   Hierarchical Adaptive MultiLevel Project
-  `preCICE <https://www.precice.org>`__ - A fully parallel
   coupling library for partitioned multi-physics simulations
-  `PyClaw <https://www.clawpack.org/pyclaw/>`__ A massively
   parallel, high order accurate, hyperbolic PDE solver
-  `SLEPc <https://slepc.upv.es/>`__ Scalable Library for
   Eigenvalue Problems


.. _doc_index_citing_petsc:

Citing PETSc
============

You can run any PETSc program with the option ``-citations`` to print appropriate citations for the algorithms you are using within PETSc.

For general citations on PETSc please use the following:

.. literalinclude:: /petsc.bib
   :language: none
   :start-at: @misc{petsc-web-page
   :end-at: year
   :append: }

.. literalinclude:: /petsc.bib
   :language: none
   :start-at: @techreport{petsc-user-ref
   :end-at: year
   :append: }

.. literalinclude:: /petsc.bib
   :language: none
   :start-at: @inproceedings{petsc-efficient
   :end-at: year
   :append: }

For PETSc usage on GPUs please cite

.. literalinclude:: /petsc.bib
   :language: none
   :start-at: @article{MILLS2021
   :end-at: author
   :append: }

For PetscSF -- parallel communication in PETSc -- please cite

.. literalinclude:: /petsc.bib
   :language: none
   :start-at: @article{PetscSF2022
   :end-at: pages
   :append: }

If you use the TS component of PETSc please cite the following:

.. literalinclude:: petsc.bib
   :language: none
   :start-at: @techreport{AbhyankarEtAl2018
   :end-at: year
   :append: }

If you utilize the TS adjoint solver please cite

.. literalinclude:: /petsc.bib
   :language: none
   :start-at: @techreport{ZhangConstantinescuSmith2019
   :end-at: year
   :append: }