Table 1: 𝐿 2 -error and order of convergence in 𝑥 when 𝜇 = 1 . 6 .

𝐮 𝐮 𝐿 2 ( Ω )
Error Order

1/4 8 . 3 7 8 1 1 𝑒 0 3
1/8 2 . 7 3 5 3 7 𝑒 0 3 1.615
1/16 8 . 7 5 7 5 2 𝑒 0 4 1.643
1/32 2 . 8 3 1 6 7 𝑒 0 4 1.629