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I need to write something like NxN in LaTeX but I do not get how... How to do such thing?

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$N\times N$ or what do you mean? – Herbert Apr 6 '11 at 10:47
Correct!!! thank you!!!))) – user4703 Apr 6 '11 at 10:48
Please make sure to accept the final solution, so that the question is marked as complete. I don't mind if Herbert posts his comment as an answer and you accept it. He was a little faster than me. – Martin Scharrer Apr 6 '11 at 10:52
Have a look at “How to look up a math symbol?” for ideas how you can easily find a particular symbol. – Caramdir Apr 6 '11 at 16:07
You can try detexify, it's very valuable for me, I am also a LaTeX beginner. You just draw on it and it gives you the LaTeX command for the symbol. – Mobius Pizza Mar 7 '12 at 14:20

The x is done by \times. It must be used in mathmode:


$N\times N$
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