remove spaces

Author: HumphreyYang

lectures/eigen_II.md

@@ -240,7 +240,6 @@ $$
 
 $A$ here is also a primitive matrix since $A^k$ is everywhere positive for some $k \in \mathbb{N}$.
 
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 $$
 B = \begin{bmatrix} 0 & 1 \\ 
                     1 & 0 
@@ -395,7 +394,6 @@ A primitive matrix is both irreducible and aperiodic.
 
 So Perron-Frobenius theorem explains why both {ref}`Imam and Temple matrix <mc_eg3>` and {ref}`Hamilton matrix <mc_eg2>` converge to a stationary distribution, which is the Perron projection of the two matrices
 
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 ```{code-cell} ipython3
 P = np.array([[0.68, 0.12, 0.20],
               [0.50, 0.24, 0.26],