Two Legendre-Dual-Petrov-Galerkin Algorithms for Solving the Integrated Forms of High Odd-Order Boundary Value Problems

Table 4

Maximum pointwise error 𝐸 for Example 2 with 𝑁=14,16,18,20.

𝑁	LDPG—1st choice	LDPG—2nd choice
14	2.66574×10^−15	1.36447×10^−15
16	4.18619×10^−16	1.3787×10^−16
18	9.4369×10^−16	1.70355×10^−16
20	1.28588×10^−15	2.01205×10^−16
24	5.1337×10^−16	1.80926×10^−16