User:Spebudmak/myownsandbox

$$\Psi_{ij} = \frac{\partial(\delta\theta_i)}{\partial\theta_j} = \begin{pmatrix}\kappa + \gamma_1&\gamma_2\\\gamma_2&\kappa-\gamma_1\end{pmatrix} $$
$$\Psi_{ij} = \int_0^{\chi{_h}}d\chi g(\chi)\partial_i\partial_j\Phi$$

$$g(\chi)=2\int_\chi^{\chi{_h}}d\chi'n(\chi')\frac{r(\chi)r(\chi'-\chi)}{r(\chi')}$$

$$\kappa \propto \int_0^{\chi{_h}}d\chi g(\chi)\rho$$