Tue Oct 19 11:51:37 2021

vcycle_test:
  Python version: 3.6.9
  vcycle applies one V-cycle to a matrix.
step 0, rel error=1.937586e-01
step 1, rel error=3.762144e-02
step 2, rel error=7.417582e-03
step 3, rel error=1.552965e-03
step 4, rel error=3.782356e-04
step 5, rel error=1.126136e-04
step 6, rel error=3.808544e-05
step 7, rel error=1.346628e-05
step 8, rel error=4.808143e-06
step 9, rel error=1.717181e-06
step 10, rel error=6.123138e-07
step 11, rel error=2.180019e-07
step 12, rel error=7.751894e-08
step 13, rel error=2.753738e-08
step 14, rel error=9.774387e-09
step 15, rel error=3.466958e-09
step 16, rel error=1.228879e-09
step 17, rel error=4.350161e-10
step 18, rel error=1.540864e-10
step 19, rel error=5.455082e-11
step 20, rel error=1.926068e-11
step 21, rel error=6.638534e-12
vcyle_test: Tolerance achieved.

vcycle_test:
  Normal end of execution.
Tue Oct 19 11:51:46 2021