petsc-3.14.5 2021-03-03
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# VecMin

Determines the vector component with minimum real part and its location.

### Synopsis

    #include "petscvec.h"
    PetscErrorCode  VecMin(Vec x,PetscInt *p,PetscReal *val)

Collective on Vec

### Input Parameters

| x | - the vector

### Output Parameter

| p | - the location of val (pass NULL if you don't want this location)
| val | - the minimum component

### Notes

Returns the value PETSC_MAX_REAL and p = -1 if the vector is of length 0.

This returns the smallest index with the minumum value

### See Also

VecMax()

### Level

intermediate

### Location

src/vec/vec/interface/rvector.c

### Examples

src/vec/vec/tutorials/ex1.c.html
src/dm/tutorials/ex15.c.html
src/ksp/ksp/tutorials/ex72.c.html
src/ts/tutorials/ex9.c.html
src/ts/tutorials/ex10.c.html
src/ts/tutorials/ex17.c.html

### Implementations

VecMin_MPIKokkos in src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx
VecMin_MPI in src/vec/vec/impls/mpi/pvec2.c
VecMin_Nest_Recursive in src/vec/vec/impls/nest/vecnest.c
VecMin_Nest in src/vec/vec/impls/nest/vecnest.c
VecMin_Node in src/vec/vec/impls/node/vecnode.c
VecMin_Seq in src/vec/vec/impls/seq/dvec2.c
VecMin_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages