Equation Set

P(A \mid B) = \frac{P(B \mid A)\,P(A)}{P(B)}

i\hbar \frac{\partial}{\partial t}\Psi(\mathbf{r}, t) = \hat{H}\,\Psi(\mathbf{r}, t)

\hat{\beta} = (X^\top X)^{-1} X^\top y

\nabla \cdot \mathbf{E} = \frac{\rho}{\varepsilon_0} \qquad \nabla \times \mathbf{B} - \mu_0\varepsilon_0 \frac{\partial \mathbf{E}}{\partial t} = \mu_0 \mathbf{J}