# Where else is $\div$ used?

The multiplication sign $\times$ is used in many places in mathematics other than arithmetic (in set theory – denoting the Cartesian product of two sets, to name an example).

The division sign $\div$, on the other hand, is seemingly only used in arithmetic. Wikipedia's list of mathematical symbols lists the sign together with $/\!$, but only provides only one example for $\div$, i.e. its use in arithmetic.

Where else in mathematics is the division sign $\div$ (the obelus) used? Googling is of no help.

• The question about the geometric mean was quite interesting. Why you have deleted it ? – callculus Nov 12 '16 at 17:27
• @callculus, the things I do for you. – user376034 Nov 12 '16 at 17:38
• Nice. I upvoted the question. – callculus Nov 12 '16 at 17:44
• @callculus perhaps if you had upvoted it from the start, I wouldn't have deleted it. To anyone interested in what the question was (now is): math.stackexchange.com/questions/2010656/…. – user376034 Nov 12 '16 at 17:48