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Recently Referred Formulae

\phi=Ae^{ikr}
E_n=\frac{n^2\pi^2\hbar^2}{2mL^2}
\frac{d^2\phi}{dx^2}=-k^2\phi
\nabla_{\lambda}G^{\lambda\rho}=0
\nabla_{\lambda}(R^{\lambda\rho}-\frac{1}{2}g^{\lambda\rho}R)=0