(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

On MikTeX, can't enter $\mathbb{R}$

Gives me a statement that says

No idea what that means?Code (Text):! Undefined control sequence.

<recently read> \mathbb

l.14 $\mathbb

{F}$

?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# \mathbb{stuff} isn't working

**Physics Forums | Science Articles, Homework Help, Discussion**