# Could you add the except ('\') symbol for Math? Isn't it kinda needed for writing stuff like "all reals except for 0" (#RR#\#{0}#)?

##### 2 Answers

Oct 14, 2015

#### Answer:

was how I was taught in set theory to write this; if this is no longer acceptable, would someone please post. (I've used this notation several times with no objections).

#### Explanation:

(It was a long time ago that I took set therory).

Oct 14, 2015

#### Answer:

Here's what you can do.

#### Explanation:

To get the "backslash" symbol for math formatting you can write the symbol in between quote marks.

Here's what I mean

*without the hashtags*

RR "\" {0}

*with the hashags*