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Test 1D Degenerate Elliptical equation without Hamilton Jacobi Parti 根据上一篇的经验:$\frac{u_x^2}{1+u_x^2}$ 对初值的选取是很敏感的,建议取消这一项,改成已知部分。 以下测试 $$ \begin{align 阅读全文
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Test code for 1D In order to test the WENO5 method and the 5 point center difference method, we test follow simple case $$ \begin{align} u_t&=u_{xx}+\ 阅读全文
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Note for constraint equation We consoder a function $$ f_x=\frac{1}{\varepsilon^2 +(x x_0)^2} $$ Integrate of this function is $$ f= \frac{1}{\varepsi 阅读全文
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Jang Equation In Spherical Symmetry Case Let us assume that the metric is $(\gamma_{rr},\gamma_{\theta\theta},\gamma_{\phi\phi})$, then we calculate t 阅读全文