更改

<math>

<math>

\begin{aligned}

\begin{aligned}

P(X_{n+m}=j|X_n=i,X_{n-1}=x_{n-1},\ldots,X_0=x_0)=P(X_{n+m}=j|X_n=i),

\mathbb{P}(X_{n+m}=j|X_n=i,X_{n-1}=x_{n-1},\ldots,X_0=x_0)=\mathbb{P}(X_{n+m}=j|X_n=i),

\end{aligned}

\end{aligned}

</math>

</math>