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LATEX\mathrm{L^{\!A}\!T_{\!E}\!X}

\color{66ccff} \pm \, \color{orange} \bar \xi

{x=1,y=2,\left\{ \begin{matrix} x=1, \\ y=2, \end{matrix} \right.

⟨12∣\left\langle\frac12\right|

f(x)= \begin{cases} 1/d_{ij} & \quad \text{when $d_{ij} \leq 100$}\\ 0 & \quad \text{otherwise} \end{cases}

M=[561605601605616]M = \begin{bmatrix} \frac{5}{6} & \frac{1}{6} & 0 \\[0.3em] \frac{5}{6} & 0 & \frac{1}{6} \\[0.3em] 0 & \frac{5}{6} & \frac{1}{6} \end{bmatrix}