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Table 1 The \(\pmb{L^{2}}\) errors and the order of the LDG method with the piecewise \(\pmb{P^{1}}\) space at \(\pmb{T=1}\)

From: Superconvergence of the local discontinuous Galerkin method for nonlinear convection-diffusion problems

N

\(\boldsymbol {e_{u}}\)

\(\boldsymbol{\xi_{u}}\)

\(\boldsymbol{L^{2}}\) error

Order

\(\boldsymbol {L^{2}}\) error

Order

10

0.0283

-

0.0030

-

20

0.0073

1.9485

3.7684e-04

2.9757

40

0.0018

2.0136

5.4173e-05

2.9889

80

4.7371e-04

1.9365

7.2521e-06

2.9011