petsc-3.10.5 2019-03-28
VecBoundGradientProjection
Projects vector according to this definition. If XL[i] < X[i] < XU[i], then GP[i] = G[i]; If X[i] <= XL[i], then GP[i] = min(G[i],0); If X[i] >= XU[i], then GP[i] = max(G[i],0);
Synopsis
#include "petscvec.h"
PetscErrorCode VecBoundGradientProjection(Vec G, Vec X, Vec XL, Vec XU, Vec GP)
Input Parameters
| G | - current gradient vector
|
| X | - current solution vector with XL[i] <= X[i] <= XU[i]
|
| XL | - lower bounds
|
| XU | - upper bounds
|
Output Parameter
GP -gradient projection vector
Notes
GP may be the same vector as G
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