Math Miscellany

\cdots

Produces a horizontal ellipsis where the dots are raised to the centre of the line. eg.

\ddots

Produces a diagonal ellipsis. eg.

\frac{num}{den}

Produces the fraction num divided by den. eg.

\ldots

Produces an ellipsis. This command works in any mode, not just math mode. eg.

\overbrace{text}

Generates a brace over text. eg.

\overline{text}

Causes the argument text to be overlined. eg.

\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 $\sqrt[3]{x+y}$. eg.

\underbrace{text}

Generates text with a brace underneath. eg.

\underline{text}

Causes the argument text to be underlined. This command can also be used in paragraph and LR modes. eg.

\vdots

Produces a vertical ellipsis. eg.