# Number sets symbols in Mathjax [duplicate]

How can we write number sets symbols using Mathjax? For example what's the code for Natural numbers set? I couldn't find that in a vast of Mathjax help documents,and the only one I found doesn't work: \Natural or \mathds{N}

## marked as duplicate by user296602, Shailesh, Joel Reyes Noche, choco_addicted, JMPJun 17 '16 at 4:39

• \Bbb{N} gives $\Bbb{N}$ here. But at least the TeX system on my laptop says that is outdated. – Jyrki Lahtonen Jun 16 '16 at 21:10
• (In particular, see point 9 about fonts). – user296602 Jun 16 '16 at 21:11
• @JyrkiLahtonen Is there any more beautiful symbol for natural numbers set depictable by Mathjax? – Hamid Reza Ebrahimi Jun 16 '16 at 21:12

One way is to use \mathbb{N}. This produces:

$$\mathbb{N}$$

This is very common.

• Any other alternative? – Hamid Reza Ebrahimi Jun 16 '16 at 20:53
• Do you know why \Natural or \mathds{N} don't work? The latter was offered by Detexify! – Hamid Reza Ebrahimi Jun 16 '16 at 20:56
• @HamidRezaEbrahimi: I don't know. I have never seen \Natural used before. – Thomas Jun 16 '16 at 20:59
• Where can I find the most comprehensive Mathjax documentation? – Hamid Reza Ebrahimi Jun 16 '16 at 21:00
• @HamidRezaEbrahimi: Probably here: docs.mathjax.org/en/latest – Thomas Jun 16 '16 at 21:01
• Thank you so much Thomas – Hamid Reza Ebrahimi Jun 16 '16 at 21:02
• @HamidRezaEbrahimi: you are welcome. – Thomas Jun 16 '16 at 21:03
• Probably \Natural and \mathds are part of some macro package, so you need to include that package to use them... – GEdgar Jun 17 '16 at 12:46