PETSc version 3.15.5
VecAXPY
Computes y = alpha x + y. 
Synopsis
#include "petscvec.h"   
PetscErrorCode  VecAXPY(Vec y,PetscScalar alpha,Vec x)
Logically Collective on Vec
Input Parameters
|  | alpha | - the scalar | 
|  | x, y | - the vectors | 
Output Parameter
Notes
x and y MUST be different vectors
This routine is optimized for alpha of 0.0, otherwise it calls the BLAS routine
   VecAXPY(y,alpha,x)                   y = alpha x           +      y
   VecAYPX(y,beta,x)                    y =       x           + beta y
   VecAXPBY(y,alpha,beta,x)             y = alpha x           + beta y
   VecWAXPY(w,alpha,x,y)                w = alpha x           +      y
   VecAXPBYPCZ(w,alpha,beta,gamma,x,y)  z = alpha x           + beta y + gamma z
   VecMAXPY(y,nv,alpha[],x[])           y = sum alpha[i] x[i] +      y
See Also
  VecAYPX(), VecMAXPY(), VecWAXPY(), VecAXPBYPCZ(), VecAXPBY()
Level
intermediate
Location
src/vec/vec/interface/rvector.c
Examples
src/vec/vec/tutorials/ex1.c.html
src/vec/vec/tutorials/performance.c.html
src/vec/vec/tutorials/ex1f.F90.html
src/vec/vec/tutorials/ex1f90.F90.html
src/vec/vec/tutorials/ex20f90.F90.html
src/mat/tutorials/ex2.c.html
src/mat/tutorials/ex9.c.html
src/dm/impls/stag/tutorials/ex1.c.html
src/dm/impls/stag/tutorials/ex2.c.html
src/dm/impls/stag/tutorials/ex3.c.html
src/dm/tutorials/ex10.c.html
Implementations
VecAXPY_Nest in src/vec/vec/impls/nest/vecnest.c
VecAXPY_Seq in src/vec/vec/impls/seq/bvec1.c
VecAXPY_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecAXPY_SeqCUDA in src/vec/vec/impls/seq/seqcuda/veccuda2.cu
VecAXPY_SeqViennaCL in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages