arguments

nrefine=2

traction=0.1

radius=0.5

poisson=0.3

start 2023-02-09 22:47:06

hole radius exact up to L2 error 9.16e-17

project

projection type: lsqr

solve

solving 60 dof system to machine precision using arnoldi solver

constructing direct preconditioner

peak memory use 216k

residual decreased by 15.9 orders using 0 krylov vectors

residual decreased by 0.1 orders using 1 krylov vectors

solver returned with residual 3e-17

constrained 60/60 dofs, error 0.00e+00/area

optimize

constrained 12/120 dofs

optimum value 0.00e+00

optimize

solve

solving 18 dof system to machine precision using arnoldi solver

constructing symmetric direct preconditioner

peak memory use 148k

residual decreased by 15.8 orders using 0 krylov vectors

residual decreased by 0.4 orders using 1 krylov vectors

solver returned with residual 1e-17

constrained 30/120 dofs

optimum value 9.74e-08

solve

solving 90 dof system to machine precision using arnoldi solver

constructing direct preconditioner

peak memory use 327k

residual decreased by 15.5 orders using 0 krylov vectors

residual decreased by 0.3 orders using 1 krylov vectors

residual decreased by 0.0 orders using 2 krylov vectors

solver returned with residual 2e-16

loop _sample_X 88%

RuntimeWarning: singular matrix In /usr/local/lib/python3.9/dist-packages/nutils/warnings.py:17

NutilsDeprecationWarning: function.sqrt is deprecated; use numpy.sqrt instead In /usr/local/lib/python3.9/dist-packages/nutils/function.py:1226

errors: L2=9.49e-05, H1=2.86e-03

finish 2023-02-09 22:47:09, elapsed 0:02