An Accurate Spectral Galerkin Method for Solving Multiterm Fractional Differential Equations

Table 4

Maximum pointwise errors using SGJG method for 𝑁=8,12,16,20,24.

𝑁	𝛼	𝛽	SGJG	𝛼	𝛽	SGJG
8	0	2	2.871⋅10^−7	1	3	5.740⋅10^−7
12			1.170⋅10^−8			1.757⋅10^−8
16			1.873⋅10^−9			2.757⋅10^−9
20			4.397⋅10^−10			6.469⋅10^−9
24			3.004⋅10^−10			9.909⋅10^−10