更改

<math>P=(p_{ij})_{i,j\in S}=\begin{bmatrix}

<math>P=(p_{ij})_{i,j\in S}=\begin{bmatrix}

p_{00}& p_{01}\\

p_{11}& p_{12}\\

p_{10}& p_{11}\\

p_{21}& p_{22}\\

\end{bmatrix}=\begin{bmatrix}

\end{bmatrix}=\begin{bmatrix}

p& 1-p\\

p& 1-p\\