LaTeX forum ⇒ Text Formatting ⇒ LaTeX representation of hollow "R" symbol for real space?

[clayton]

In LaTeX, how do I represent the hollow "R" symbol that designates the real number space?

Thanks!

[gmedina]

Hi,

use \mathbb from amsfonts (loaded by amssymb):

Code: [Select all] [Expand/Collapse] [Download] (untitled.tex) Open in Overleaf

\documentclass{report}
\usepackage{amssymb}
 
\begin{document}
 
$\mathbb{R}$
 
\end{document}

[clayton]

Works perfectly! Thanks!

[svend_tveskaeg]

Just a note:
One normally represents the sets of natural numbers, integers, rational numbers, real numbers, and complex numbers by bold letters (at least on our math institut). I only use the `hollow' letters when writing on a blackboard.)

For the real numbers that is

Code: [Select all] [Expand/Collapse] [Download] (untitled.tex) Open in Overleaf

\mathbf{R}

instead of

Code: [Select all] [Expand/Collapse] [Download] (untitled.tex) Open in Overleaf

\mathbb{R}

[localghost]

I don't think that your math institute sets the standard [1,2]. Just by the way. The use of blackboard letters for this representation is very common.

[1] Real number - Wikipedia, the free encyclopedia
[2] Reelle tal - Wikipedia, den frie encyklopædi