Changes

:<math> \mathbf{M(r)} = -\mathbf{\hat{n}\times} \begin{bmatrix} 1+R_{||} & 0 \\ 0 & 1_R_1-R_{\perp} \end{bmatrix} \cdot \begin{bmatrix} \mathbf{E_{||}^{inc}(r)} \\ \mathbf{E_{\perp}^{inc}(r)} \end{bmatrix} </math>