PETSc version 3.16.3

PETSc Help Index

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 sys/ex5.c

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 Solves a linear system in parallel with KSP

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 DM
 using distributed arrays Solves a linear system in parallel with KSP and DM
 DMDA
 using distributed arrays -Laplacian u = b as a nonlinear problem
 Bratu nonlinear PDE in 2d
 Bratu nonlinear PDE in 3d
 ksp/ksp/ex14f.F90
 Minimum surface problem in 2D
 Nonlinear driven cavity with multigrid in 2d
 Nonlinear Radiative Transport PDE with multigrid in 2d
 snes/ex5f.F90
 snes/ex5f90.F90
 snes/ex5f90t.F90
 Surface processes in geophysics
 Transient nonlinear driven cavity in 2d

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 Fortran90
 accessing indices in index set vec/is/is/ex3f90.F90
 accessing indices of index set vec/is/is/ex1f90.F90
 assembling vectors vec/vec/ex4f90.F90
 using basic vector routines vec/vec/ex1f90.F90
 vec/vec/ex20f90.F90

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 Demonstrates using ISLocalToGlobalMappings with block size

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 index sets
 accessing indices from Fortran vec/is/is/ex2f.F
 creating a block index set Demonstrates creating a blocked index set
 creating a stride index set Demonstrates creating a stride index set
 creating general Creating a general index set
 manipulating a block index set vec/is/is/ex3f90.F90
 manipulating a general index set Creating a general index set
 vec/is/is/ex1f.F
 vec/is/is/ex1f90.F90
 manipulating a stride index set vec/is/is/ex2f.F
 Illustrates creating an options database
 Introductory example that illustrates printing
 Introductory example that illustrates running PETSc on a subset of processes
 sys/ex16.c
 sys/ex4f.F
 sys/ex4f90.F90
 IS
 creating a block index set Demonstrates creating a blocked index set
 creating a general index set Creating a general index set
 creating a stride index set Demonstrates creating a stride index set
 Bratu nonlinear PDE in 2d
 Surface processes in geophysics

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 Additive Schwarz Method (ASM) with user-defined subdomains Illustrates use of the preconditioner ASM
 Additive Schwarz Method (GASM) with user-defined subdomains Illustrates use of PCGASM
 Illustrates use of the preconditioner GASM
 basic parallel example Bilinear elements on the unit square for Laplacian
 ksp/ksp/ex10.c
 ksp/ksp/ex15f.F90
 ksp/ksp/ex2f.F90
 ksp/ksp/ex67.c
 Solves a (permuted) linear system in parallel with KSP
 Solves a linear system in parallel with KSP
 Solves a linear system in parallel with KSP and DM
 Solves a tridiagonal linear system
 basic sequential example ksp/ksp/ex13f90.F90
 Solves a variable Poisson problem with KSP
 customizing the block Jacobi preconditioner Block Jacobi preconditioner for solving a linear system in parallel with KSP
 ksp/ksp/ex7f.F90
 different matrices for linear system and preconditioner ksp/ksp/ex6f.F90
 Laplacian, 2d ksp/ksp/ex12.c
 ksp/ksp/ex13f90.F90
 Solves 2D inhomogeneous Laplacian
 Solves 2D inhomogeneous Laplacian using multigrid
 Solves a (permuted) linear system in parallel with KSP
 Solves a linear system in parallel with KSP
 Solves a linear system in parallel with KSP and DM
 Solves a sequence of linear systems with different right-hand-side vectors
 Solves a variable Poisson problem with KSP
 Laplacian, 3d Solves 3D Laplacian using multigrid
 repeatedly solving linear systems ksp/ksp/ex5f.F90
 ksp/ksp/ex6f.F90
 Solves a sequence of linear systems with different right-hand-side vectors
 Solves two linear systems in parallel with KSP
 The solution of 2 different linear systems with different linear solvers
 setting a user-defined monitoring routine ksp/ksp/ex2f.F90
 solving a Helmholtz equation ksp/ksp/ex11f.F90
 Solves a linear system in parallel with KSP
 solving a linear system Reads a PETSc matrix and vector from a file and solves a linear system
 Reads a PETSc matrix and vector from a file and solves the normal equations
 Reads a PETSc matrix and vector from a socket connection, solves a linear system and sends the result back
 solving a system of linear equations ksp/ksp/ex12.c
 ksp/ksp/ex1f.F90
 ksp/ksp/ex54f.F90
 Solves 2D inhomogeneous Laplacian
 Solves 2D inhomogeneous Laplacian using multigrid
 Solves 3D Laplacian using multigrid
 Solves a tridiagonal linear system with KSP
 writing a user-defined nonlinear solver ksp/ksp/ex14f.F90

| A | B | C | D | F | G | H | I | K | L | M | N | O | P | S | T | V |

 Solves a (permuted) linear system in parallel with KSP
 Solves a linear system in parallel with KSP
 Solves a linear system in parallel with KSP and DM
 Solves a sequence of linear systems with different right-hand-side vectors
 Solves a variable Poisson problem with KSP
 Demonstrates using ISLocalToGlobalMappings with block size

| A | B | C | D | F | G | H | I | K | L | M | N | O | P | S | T | V |

 Mat
 composite matrices mat/ex9.c
 image segmentation mat/ex15.c
 mat/ex17.c
 mat/ex12.c
 Reads a PETSc matrix and vector from a file and reorders it
 mat partitioning mat/ex15.c
 mat/ex17.c
 mesh partitioning mat/ex11.c
 Reads a PETSc matrix and vector from a file and reorders it
 Matrices
 inserting elements by blocks Bilinear elements on the unit square for Laplacian
 Nonlinear Radiative Transport PDE with multigrid in 2d

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 optimization
 likely Example of using PetscLikely() and PetscUnlikely()
 unlikely Example of using PetscLikely() and PetscUnlikely()

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 PC
 registering preconditioners ksp/ksp/ex12.c
 setting a user-defined shell preconditioner ksp/ksp/ex15f.F90
 Solves a linear system in parallel with KSP
 Newton methods to solve u'' = f in parallel with periodic boundary conditions
 petsc
 introduction Synchronized printing
 PetscLog
 activating/deactivating events for profiling Augmenting PETSc profiling by add events
 activating/deactivating events for profiling (basic example) sys/ex3f.F
 sys/logging/ex1f.F90
 mat/ex12.c
 Reads a PETSc matrix and vector from a file and reorders it
 profiling multiple stages of code ksp/ksp/ex5f.F90
 Solves two linear systems in parallel with KSP
 The solution of 2 different linear systems with different linear solvers
 user-defined event profiling Augmenting PETSc profiling by add events
 The solution of 2 different linear systems with different linear solvers
 user-defined event profiling (basic example) sys/ex3f.F
 sys/logging/ex1f.F90
 printf
 in parallel Synchronized printing
 synchronized Synchronized printing
 printing
 in parallel Illustrates creating an options database
 Introductory example that illustrates printing
 Synchronized printing
 sys/ex16.c
 synchronized Synchronized printing
 process
 subset set PETSC_COMM_WORLD Introductory example that illustrates running PETSc on a subset of processes
 sys/ex4f.F
 sys/ex4f90.F90
 profiling
 activating/deactivating events Augmenting PETSc profiling by add events
 user-defined event Augmenting PETSc profiling by add events

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 SNES
 basic example Newton's method for a two-variable system, sequential
 Newton's method to solve a two-variable system that comes from the Rosenbrock function
 basic parallel example Newton methods to solve u'' = f in parallel with periodic boundary conditions
 Newton methods to solve u'' + u^{2} = f in parallel
 basic uniprocessor example Newton method to solve u'' + u^{2} = f, sequentially
 snes/ex1f.F90
 parallel Bratu example -Laplacian u = b as a nonlinear problem
 Bratu nonlinear PDE in 2d
 Bratu nonlinear PDE in 3d
 snes/ex5f.F90
 snes/ex5f90.F90
 snes/ex5f90t.F90
 snes/ex73f90t.F90
 parallel Surface process example Surface processes in geophysics
 setting a user-defined monitoring routine Newton method to solve u'' + u^{2} = f, sequentially
 Newton methods to solve u'' + u^{2} = f in parallel
 setting a user-defined reasonview routine Newton method to solve u'' + u^{2} = f, sequentially
 solving a system of nonlinear equations Minimum surface problem in 2D
 Nonlinear Radiative Transport PDE with multigrid in 2d
 solving a system of nonlinear equations (parallel multicomponent example) Nonlinear driven cavity with multigrid in 2d
 stride
 creating a stride index set Demonstrates creating a stride index set

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 TAO
 Solving a bound constrained minimization problem tao/bound/jbearing2.c
 tao/bound/plate2.c
 tao/bound/plate2f.F90
 Solving a complementarity problem tao/complementarity/blackscholes.c
 tao/complementarity/minsurf1.c
 Solving a system of nonlinear equations, nonlinear least squares Finds the least-squares solution to the under constraint linear model Ax = b, with L1-norm regularizer
 Finds the least-squares solution to the under constraint linear model Ax = b, with regularizer
 tao/leastsquares/chwirut1.c
 tao/leastsquares/chwirut2.c
 tao/pde_constrained/elliptic.c
 tao/pde_constrained/hyperbolic.c
 tao/pde_constrained/parabolic.c
 Solving an unconstrained minimization problem tao/constrained/maros.c
 tao/leastsquares/chwirut1f.F90
 tao/leastsquares/chwirut2f.F90
 tao/unconstrained/eptorsion1.c
 tao/unconstrained/eptorsion2.c
 tao/unconstrained/eptorsion2f.F
 tao/unconstrained/minsurf2.c
 tao/unconstrained/rosenbrock1.c
 tao/unconstrained/rosenbrock1f.F90
 tao/unconstrained/rosenbrock2.c
 tao/unconstrained/rosenbrock3.c
 adjoint for time dependent parameters ts/ex20td.c
 adjoint sensitivity analysis Performs adjoint sensitivity analysis for the van der Pol equation
 All at once approach to sensitivity tracking ts/ex20td.c
 Burger's equation ts/ex50.c
 Customized adjoint monitor based sensitivity tracking ts/ex20td.c
 differential-algebraic equation Transient nonlinear driven cavity in 2d
 diffusion equation Solves a simple time-dependent linear PDE (the heat equation)
 heat equation Solves a simple time-dependent linear PDE (the heat equation)
 multicomponent Transient nonlinear driven cavity in 2d
 nonlinear problems Solves the time independent Bratu problem using pseudo-timestepping
 ts/ex1f.F
 Optimization using adjoint sensitivity analysis Solves a ODE-constrained optimization problem -- finding the optimal initial conditions for the van der Pol equation
 Solves the van der Pol equation
 pseudo-timestepping Solves the time independent Bratu problem using pseudo-timestepping
 ts/ex1f.F
 solving a system of nonlinear equations (parallel multicomponent example) Transient nonlinear driven cavity in 2d
 time-dependent linear problems Solves a simple time-dependent linear PDE (the heat equation)
 time-dependent nonlinear problems Performs adjoint sensitivity analysis for the van der Pol equation
 Solves a ODE-constrained optimization problem -- finding the optimal initial conditions for the van der Pol equation
 Solves a time-dependent nonlinear PDE
 Solves a time-dependent nonlinear PDE with lower and upper bounds on the interior grid points
 Solves the van der Pol DAE
 Solves the van der Pol equation
 Solves the van der Pol equation and demonstrate IMEX
 ts/ex50.c
 van der Pol DAE Solves the van der Pol DAE
 van der Pol equation Performs adjoint sensitivity analysis for the van der Pol equation
 Solves the van der Pol equation and demonstrate IMEX
 van der Pol equation DAE equivalent Performs adjoint sensitivity analysis for the van der Pol equation
 Solves a ODE-constrained optimization problem -- finding the optimal initial conditions for the van der Pol equation
 Solves the van der Pol equation
 Variational inequality nonlinear solver Solves a time-dependent nonlinear PDE with lower and upper bounds on the interior grid points

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 vectors
 arrays vec/vec/ex4f90.F90
 arrays of vectors vec/vec/ex4f.F
 assembling vec/vec/ex2f.F
 vec/vec/ex4f.F
 assembling vectors Builds a parallel vector with 1 component on the first processor, 2 on the second, etc
 Computes the integral of 2*x/(1+x^2) from x=0
 Demonstrates use of VecCreateGhost()
 vec/vec/ex14f.F90
 vec/vec/ex4f90.F90
 vec/vec/ex9f.F90
 assembling vectors with local ordering Demonstrates using a local ordering to set values into a parallel vector
 basic routines Basic vector routines
 vec/vec/ex1f.F90
 vec/vec/ex21f90.F90
 drawing vectors Parallel vector layout
 vec/vec/ex3f.F
 fortran-c Demonstrates calling a Fortran computational routine from C
 ghost padding Demonstrates use of VecCreateGhost()
 vec/vec/ex14f.F90
 vec/vec/ex9f.F90
 norms of sub-vectors Demonstrates VecStrideNorm()
 vec/vec/ex11f.F
 vec/vec/ex11f90.F90
 setting values Parallel vector layout
 sub-vectors Demonstrates VecStrideScatter() and VecStrideGather()
 Demonstrates VecStrideScatter() and VecStrideGather() with subvectors that are also strided
 using basic vector routines vec/vec/ex1f90.F90
 vec/vec/ex20f90.F90
 viewing Parallel HDF5 Vec Viewing
 Vectors