Math Miscellany

LaTeX2e help 1.6

### 2.13.4: Math Miscellany

`\cdots` | Produces a horizontal ellipsis where the dots are raised to the centre of the line.
`\ddots` | Produces a diagonal ellipsis.
`\frac{num}{den}` | Produces the fraction `num` divided by `den`.
`\ldots` | Produces an ellipsis. This command works in any mode, not just math mode.
`\overbrace{text}` | Generates a brace over text.
`\overline{text}` | Causes the argument text to be overlined.
`\sqrt[root]{arg}` | Produces the square root of its argument. The optional argument, `root`, determines what root to produce, i.e., the cube root of `x+y` would be typed as `$\sqrt[3]{x+y}$`.
`\underbrace{text}` | Generates text with a brace underneath.
`\underline{text}` | Causes the argument text to be underlined. This command can also be used in paragraph and LR modes.
`\vdots` | Produces a vertical ellipsis.