The real number symbol is represented by R’s bold font-weight or typestyle blackboard bold. However, in most cases the type-style of capital letter R is blackboard-bold.
| Symbol | Real Number Set |
|---|---|
| Type of symbol | Mathematics |
| Package (requirement) | amsmath, amssymd, or texfonts |
| Argument | Yes, R |
| Latex command | \mathbb{R} |
| Example | \mathbb{R} → ℝ |
Use mathbb command in latex
To do this, you need to have \mathbb{R} command that is present in multiple packages. For example amsmath, amssymb, texfonts, and pxfonts.
\documentclass{article}
\usepackage{amssymb}
\begin{document}
\[ \mathbb{R}\in \left[a_1,a_n\right] \]
\[ \mathbb{R}\in \left[S_1,S_n\right] \]
\[ \mathbb{R}_1, \mathbb{R}^n,\mathbb{R}_{-*},\mathbb{R}_{+*} \]
\end{document}Output :
Add superscript and subscript with real number
Positive real number and Negative real number symbols are denoted by ℝ+ and ℝ–. Which, you can easily represent using the superscript with the \mathbb command.
\documentclass{article}
\usepackage{amssymb}
\begin{document}
\[ \mathbb{R}_{\geq 0} \in \mathbb{R}^+ \cup \{0\} \]
\[ 0 < \mathbb{R}^+ < \infty \]
\[ -\infty < \mathbb{R}^- <0 \]
\[ \mathbb{R}_0 = \{0\} \]
\end{document}Output :
