Special Letters not working on KATEX on Github

Question

After May 2022, github are now accepting KATEX directly on markdown using $$$$

I'm trying to use the following letters on markdown using the $$$$ special characters to use the KATEX on my github but the following letters are not working.

Code	Letter displayed	expected
$$\N$$	$$\N$$
$$\Z$$	$$\Z$$
$$\Reals$$	$$\Reals$$
$$\R$$	$$\R$$
$$\natnums$$	$$\natnums$$

in github:

Answer 1

After some study, I find out a KATEX command called \mathbb{text} who cna change the font from the text inside the curly brackets

One example:

$$ A =  \lbrace x \in \mathbb{N} \space | \space x < 5 \rbrace $$

Some information:

\lbrace and \rbrace are the { } curly brace symbol in KATEX

\space insert space between texts

In github thanks to \mathbb{text} it can make the symbol i showed in my question:

The table of symbol and code

Code	Symbol
$$\mathbb{N}$$	$$\mathbb{N}$$
$$\mathbb{Z}$$	$$\mathbb{Z}$$
$$\mathbb{R}$$	$$\mathbb{R}$$

On Github preview: