I would like to use Latex to express the form of "rational and irrational numbers are included in real numbers."

In other words, I would like to express the following ASCII art in the form of an image, but I am worried because I do not know how to output only the left large-wave parentheses conveniently.

```
/ Reasonable number
Real number - |
\ irrational number
```

[LaTeX]Refer to the parentheses writing list and the summary of how to change the size

```
real\biggm{
US>Rational\\
US>Unreasonable\\
```

I tried it with my senses, but it didn't work, and I was at a loss because I couldn't find a page trying the same thing.

To sum up,

- I want to use parentheses to mean that a single set contains two terms, such as rational and irrational numbers

Thank you for your time.

latex mathematics

2022-09-30 13:55

"The ""Depending on {Depending on the page below"" is likely to apply."

http://www1.kiy.jp/~yoka/LaTeX/latex.html

Example Description:

```
\begin {equation}
f(x)=\left\{
\begin {array} {l}
US>1 (when x = 1)\\
0 (when x 1 1)
\end {array}
\right.
\end {equation}
```

2022-09-30 13:55

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