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Theory and Modern Applications

Table 3 Maximum error \(E_{\varepsilon }^{N,M}\) for Example 5.1 using the adaptive grid method with \(\varepsilon _{2}=10^{-2}\)

From: Parameter uniform numerical method for a system of two coupled singularly perturbed parabolic convection-diffusion equations

\(\varepsilon _{1}\)

Number of intervals N/time size Δt

\(32/\frac{1}{20}\)

\(64/\frac{1}{40}\)

\(128/\frac{1}{80}\)

\(256/\frac{1}{160}\)

\(512/\frac{1}{320}\)

10−3

1.5659e − 01

9.0728e − 02

4.9472e − 02

2.5685e − 02

1.3157e − 02

10−4

1.6708e − 01

9.6715e − 02

5.2283e − 02

2.7677e − 02

1.4250e − 02

10−5

1.8039e − 01

9.7457e − 02

5.2987e − 02

2.8267e − 02

1.5248e − 02

10−6

1.7981e − 01

9.7493e − 02

5.3310e − 02

2.8267e − 02

1.6714e − 02

10−7

1.8023e − 01

1.0099e − 01

5.3679e − 02

2.8865e − 02

1.6969e − 02