When we write mathematical proofs or logical statements, we often need to use certain symbols that are very common but extremely important. One of these symbols is ∀, known as the “Forall” symbol.
In this tutorial, we will walk you through how to use the ∀ symbol in LaTeX, and how to customize it using different packages. Let’s get started!
Default forall Command
Adding the ∀ symbol in LaTeX is really simple and doesn’t require much effort. You just need to use the \forall command to get it.
You don’t need to install any special packages. Just use the default command, and you can write it easily. Here’s an example:
\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
\[ P(x) \; \forall x \in X \]
\[ \forall_{x \in X} P(x) \]
\end{document}Output :
When you compile this code, you’ll see the ∀ symbol displayed nicely. It’s a really simple method, isn’t it?
Use MnSymbol Package for Forall
Sometimes, we might want our symbols to look a bit different. For this, we can use the MnSymbol package.
This package provides various mathematical symbols in LaTeX. When you install and use it, the ∀ symbol will appear in a slightly different style.
\documentclass[12pt]{article}
\usepackage{MnSymbol}
\begin{document}
\[ \forall x \in X \; R(x)\]
\[ R(x) \; \forall x \in X \]
\end{document}Output :
Use FdSymbol Package
You notice use of default command and mnsymbol package in the above content. Where the shape of symbol is almost same.
But, fdsymbol package will return bold font style.
\documentclass[12pt]{article}
\usepackage{fdsymbol}
\begin{document}
\[ \forall x \in X \; Q(x)\]
\[ Q(x) \; \forall x \in X \]
\end{document}
Output :
Use Stix Package
The Stix package is another great option that provides mathematical and text fonts. By using it, you can get a uniform and professional style for the ∀ symbol.
\documentclass{article}
\usepackage{stix}
\begin{document}
\[ \forall x \in X \; S(x)\]
\[ S(x) \; \forall x \in X \]
\end{document}Output :
This package changes symbol shape from normal to bold and along with changing the font family.
Conclusion
Using the default command is an easy way to use the ∀ symbol, but you can also customize its style using different packages. By using MnSymbol, FdSymbol, and Stix packages, you can choose the style of the ∀ symbol that best fits your needs.
