This question already has an answer here:

How can I type the "isomorphic","not equal" and "the set of integers , rationals and reals" symbol ?

What is the code ?

$=$ means equal, how to write "not equal"

What about real numbers, rationals, natural numbers and integers?

marked as duplicate by Najib Idrissi, Joel Reyes Noche, Surb, Aaron Maroja, Daniel W. Farlow Apr 28 '15 at 7:24

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 19 down vote accepted

$\cong$ for $\cong$

$\ne$ for $\ne$

$\mathbb{R}$, $\mathbb{Q}$, and $\mathbb{Z}$ for $\mathbb{R}$, $\mathbb{Q}$, and $\mathbb{Z}$, respectfully.

See here to learn how to do it all.

  • thanx :) what about the symbol of generated group ? – Fawzy Hegab Jun 10 '13 at 0:34
  • @MathsLover That's something you will find by following the link in the answer, or the links given there. Or from the source code of posts on the main site, which you can see by clicking edit. – ˈjuː.zɚ79365 Jun 10 '13 at 1:11
  • ok :) i will explore :D – Fawzy Hegab Jun 10 '13 at 1:35

One method for finding the LaTeX for a character is to draw it on


You can practice all the symbols here

Not the answer you're looking for? Browse other questions tagged .