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Table 2 Table of errors and order of convergence

From: A new mixed discontinuous Galerkin method for the electrostatic field

h\(\| u - u^{h}\|_{h}\)Order\(\| p - p^{h}\|_{h}\)Order
0.43670.1102E+000.7005E+00
0.21840.3162E−011.800.2201E+001.75
0.17330.1808E−012.410.1504E+001.64
9.268E−020.4451E−022.230.6111E−011.43
7.703E−020.3052E−022.040.4803E−011.30