petsc-3.14.5 2021-03-03
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# VecWhichLessThan

Creates an index set containing the indices where the vectors Vec1 < Vec2

### Synopsis

    #include "petscvec.h"
    PetscErrorCode VecWhichLessThan(Vec Vec1, Vec Vec2, IS *S)

Collective on S

### Input Parameters

| Vec1, Vec2 | - the two vectors to compare

### OutputParameter

| S | - The index set containing the indices i where vec1[i] < vec2[i]

### Notes

The two vectors must have the same parallel layout

For complex numbers this only compares the real part

### Level

advanced

### Location

src/vec/vec/utils/projection.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages