NUTILS 8.1 "Idiyappam"

arguments

nelems=10

etype=square

btype=std

degree=1

start 2023-08-15 01:56:33

optimize

solve

solving 21 dof system to machine precision using arnoldi solver

constructing symmetric direct preconditioner

matrix is diagonally dominant, solving as SPD

peak memory use 148k

residual decreased by 15.9 orders using 0 krylov vectors

residual decreased by 0.1 orders using 1 krylov vectors

solver returned with residual 5e-17

constrained 21/121 dofs

optimum value 4.32e-10

solve

solving 100 dof system to machine precision using arnoldi solver

constructing direct preconditioner

peak memory use 213k

residual decreased by 15.0 orders using 0 krylov vectors

residual decreased by 0.1 orders using 1 krylov vectors

residual decreased by 0.0 orders using 2 krylov vectors

solver returned with residual 2e-15

L2 error: 2.56e-04

finish 2023-08-15 01:56:35, elapsed 0:01