奇怪的 Markdown / LaTeX 笔记

记一下日常见到的一些奇怪的 Markdown / LaTeX 用法...

Markdown

LaTeX

LaTeX 数学

1. 运算符

1.1 造运算符:

a operatorname{sin} c | (a operatorname {sin} c)

2. 特殊符号

2.1 点

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:

• cdots | (a cdots b)
• vdots | (a vdots b)
• ddots | (a ddots b)
• ldots | (a ldots b)

For example:

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

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

2.2 分数/二项式系数

(TeX) style:

• {a over b} | ({a over b})
• {a atop b} | ({a atop b})
• {a choose b} | ({a choose b})
• {a rack b} | ({a rack b})
• {a race b} | ({a race 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)

• inom ab | (inom 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 extstyle
      • 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)
  • frac: fraction in the text style | ( frac ab)