Figure 2
From: Legendre spectral element method for solving sine-Gordon equation

Absolute error for sine-Gordon equation for Example 5.1 with \(N = 4\), \(N_{e} = 20\), and \(k=0.1\)
From: Legendre spectral element method for solving sine-Gordon equation
Absolute error for sine-Gordon equation for Example 5.1 with \(N = 4\), \(N_{e} = 20\), and \(k=0.1\)