MatLMVMSetHistorySize

Set the number of past iterates to be stored for the construction of the limited-memory QN update.

Synopsis

#include "petscksp.h" 
PetscErrorCode MatLMVMSetHistorySize(Mat B, PetscInt hist_size)

Input Parameters

• B - An LMVM-type matrix

• hist_size - number of past iterates (default 5)

Options Database Key

• -mat_lmvm_hist_size - set number of past iterates

See Also

KSP: Linear System Solvers, LMVM Matrices, MATLMVM, MatLMVMGetUpdateCount()

Level

beginner

Location

src/ksp/ksp/utils/lmvm/lmvmutils.c

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