PETSc version 3.15.5
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