1L^2 norm of the error 4 0.0217259 2L^2 norm of the error 6 0.000141342 3L^2 norm of the error 8 1.51625e-06 4L^2 norm of the error 10 1.23208e-08 5L^2 norm of the error 12 7.45863e-11 6L^2 norm of the error 14 3.4819e-13 7L^2 norm of the error 16 1.36721e-13 8L^2 norm of the error 18 1.02545e-13 9L^2 norm of the error 20 8.73312e-15 10L^2 norm of the error 22 2.93241e-13 11L^2 norm of the error 24 9.18689e-14 12L^2 norm of the error 26 1.26325e-13 13L^2 norm of the error 28 3.81552e-13 14L^2 norm of the error 30 6.98988e-13 15L^2 norm of the error 32 3.92242e-12 16L^2 norm of the error 34 3.6188e-12 17L^2 norm of the error 36 9.42266e-14 18L^2 norm of the error 38 5.32301e-12 19L^2 norm of the error 40 1.5673e-12 20L^2 norm of the error 42 2.98927e-13 21L^2 norm of the error 44 6.80153e-12 22L^2 norm of the error 46 4.8665e-12 23L^2 norm of the error 48 5.02028e-12 24L^2 norm of the error 50 1.65898e-11 25L^2 norm of the error 52 6.97746e-13 26L^2 norm of the error 54 1.31666e-11 27L^2 norm of the error 56 1.43128e-12 28L^2 norm of the error 58 1.34521e-11 29L^2 norm of the error 60 7.22538e-12 30L^2 norm of the error 62 2.15111e-11 31L^2 norm of the error 64 3.23238e-11 32L^2 norm of the error 66 6.11825e-11 33L^2 norm of the error 68 2.49563e-11 34L^2 norm of the error 70 3.90966e-11 35L^2 norm of the error 72 1.57606e-11 36L^2 norm of the error 74 1.37668e-12 37L^2 norm of the error 76 1.39255e-11 38L^2 norm of the error 78 7.32434e-11 39