Test formule

[latexpage] \begin{tikzpicture} [+preamble] \usepackage{tikz} \usepackage{pgfplots} \pgfplotsset{compat=newest} [/preamble] \begin{axis} \addplot3[surf,domain=0:360,samples=40] {cos(x)*cos(y)}; \end{axis} \end{tikzpicture} \[ E=m c^2 \] \[ \nabla\cdot\vec{E}=\frac{\rho}{\epsilon_0} \] \[ \nabla\cdot\vec{B}=0 \] \[ \nabla\times\vec{E}=-\frac{\partial{\vec{B}}}{\partial t} \] \[ \nabla\times\vec{B}=\mu_0 \vec{j}+\frac{1}{c^2}\frac{\partial{\vec{E}}}{\partial t} \]

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