奇怪的 Markdown / LaTeX 笔记

程序员明明技术 2022年11月14日

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记一下日常见到的一些奇怪的 Markdown / LaTeX 用法…

Markdown

a \operatorname{sin} c | $a \operatorname {sin} c$

语义的点:

\dotsc for “dots with commas” | $a \dotsc b$
\dotsb for “dots with binary operators/relations” | $a \dotsb b$
\dotsm for “multiplication dots” | $a \dotsm b$
\dotsi for “dots with integrals” | $a \dotsi b$
\dotso for “other dots” (none of the above) | $a \dotso b$
\dots output the most suitable form based on the immediate context
- a \dots b | $a \dots b$
- a + \dots + b | $a + \dots + b$
- \int_{a_1}\int_{a_2} \dots \int_{a_n} | $\int_{a_1}\int_{a_2} \dots \int_{a_n}$

位置的点:

For example:

M
=\begin{bmatrix}
A  &  B  & \cdots\ &C\\
D  &  E  & \cdots\ & F\\
 \vdots   & \vdots & \ddots  & \vdots  \\
 G & H  & \cdots\ & I\\
\end{bmatrix}

\[M
=\begin{bmatrix}
A & B & \cdots\ &C\\
D & E & \cdots\ & F\\
\vdots & \vdots & \ddots & \vdots \\
G & H & \cdots\ & I\\
\end{bmatrix}
\]

$\TeX$ style:

{a \over b} | ${a \over b}$
{a \atop b} | ${a \atop b}$
{a \choose b} | ${a \choose b}$
{a \brack b} | ${a \brack b}$
{a \brace b} | ${a \brace b}$
generate:
- {a \above dimension(nullable) b}
  - dimension: xpt; 0.4pt as default; 0pt hide
  - {a \above 0.5pt b} | ${a \above 0.5pt b}$
  - {a \above {} b} | ${a \above {} b}$ (error in mathjax…)

$\LaTeX$ style:

\frac ab | $\frac ab$
\binom ab | $\binom ab$
generate:
- {\genfrac leftdelimiter rightdelimiter dimension style numerator denominator}
- leftdelimiter, rightdelimiter, dimension, style, numerator, denominator are all nullable, you could use {} instead
  - style (nullable):
    - 0 denotes \displaystyle
    - 1 denotes \textstyle
    - 2 denotes \scriptstyle
    - 3 denotes \scriptscriptstyle
  - \genfrac(]{0pt}{2}{a+b}{c+d} | $\genfrac(]{0pt}{2}{a+b}{c+d}$
  - \genfrac{}{}{0pt}{}{a+b}{c+d} | $\genfrac{}{}{0pt}{}{a+b}{c+d}$
other:
- \dfrac: fraction in the display style | $\dfrac ab$
- \tfrac: fraction in the text style | $\tfrac ab$