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Table 4 Numerical results for Example  2 with \(\pmb{h=2^{-8}}\) and \(\pmb{\beta =\frac{2}{3}}\)

From: An expanded mixed finite element simulation for two-sided time-dependent fractional diffusion problem

τ 1/8 1/16 1/32 1/64 Order
\(\Vert u-u_{h} \Vert \) 3.75e−02 1.10e−02 3.58e−03 1.44e−03 1.30
\(\vert\!\vert\!\vert p-p_{h}\vert\!\vert\!\vert \) 9.00e−03 3.20e−03 1.50e−03 7.42e−04 1.02
\(\vert\!\vert\!\vert q-q_{h}\vert\!\vert\!\vert \) 1.95e−03 9.49e−03 4.71e−03 2.35e−03 1.00