topology 1/1
integrating 1 distinct blocks
project
projection type: lsqr
integrating 1+1+1+1 distinct blocks
solve
solving 60 dof system to machine precision using direct solver
refinement iteration 1
residual decreased to 5e-17
refinement iteration 2
residual decreased to 4e-17
refinement iteration 3
residual decreased to 3e-17
refinement iteration 4
residual increased to 3e-17 (discarding)
solver returned with residual 3e-17
constrained 60/60 dofs, error 7.45e-09/area
topology 1/1
integrating 1+1 distinct blocks
solve
solving 90 dof system to machine precision using direct solver
refinement iteration 1
residual decreased to 2e-16
refinement iteration 2
residual increased to 3e-16 (discarding)
solver returned with residual 2e-16
evaluating 88%
RuntimeWarning: singular matrix
In /home/docs/checkouts/readthedocs.org/user_builds/nutils/checkouts/v6.3/nutils/warnings.py:30
topology 1/1
integrating 1 distinct blocks