\* (LaTeX2e unofficial reference manual (November 2018))

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#### 16.7.2 `\*`

Synopsis:

    \*

A multiplication symbol that allows a line break. If there is a break then LaTeX puts a `\times` symbol, ×, before that break.

In `\( A_1\* A_2\* A_3\* A_4 \)`, if there is no line break then LaTeX outputs it as though it were `\( A_1 A_2 A_3 A_4 \)`. If a line break does happen, for example between the two middle ones, then LaTeX sets it like `\( A_1 A_2 \times \)`, followed by the break, followed by `\( A_3 A_4 \)`.

Unofficial LaTeX2e reference manual