\* ¶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 \( A_3 A_4 \).