how do I include a .tex macros file inside every ipynb file/ chapter?

[murphyk]

Hi

I am able to define latex math macros in each notebook separately by writing things like

```{math}

\newcommand{\real}{\mathbb{R}}
...

But I don't want to repeat this in each file.

I would like to import an existing .tex file with macro definitions.
It seems that jupyter contrib nbextensions supports this, but I don't know how to make this work with jupyter book. Any advice?

PS. I've tried to define some common macros to my _config.yml file following the official document
but it does not work. For exmaple, suppose I add

sphinx:
  config:
    mathjax_config:
      TeX:
        Macros:
          "N": "\\mathbb{N}"
          "floor": ["\\lfloor#1\\rfloor", 1]

and then put this in my .ipynb file:

Here is $\N=10$ and blah. $\floor{42.3}= 42$.

generates this:

[mmcky]

Thanks @murphyk.

This has recently been updated in the docs but it is currently only reflected in the latest version and not reflected on stable yet.

https://jupyterbook.org/en/latest/advanced/sphinx.html (tag: latest bottom right)

mathjax v3 has updated some internal tag definitions so the TeX and Macros should all be lower case in the _config.yml

sphinx:
  config:
    mathjax_config:
      tex:
        macros:
          "N": "\\mathbb{N}"
          "floor": ["\\lfloor#1\\rfloor", 1]

Would you mind giving that a try to see if that fixes your issue?

P.S. Machine Learning: A Probabilistic Perspective is a core member of my machine learning book library -- a beautiful book ❤️

[patel-zeel]

Hi, @mmcky, I am working with Dr. @murphyk on the same project. I was wondering if there is a way to directly use a .tex file with defined macros. As of now, it seems that we may need to use an additional \ for each command, unlike native latex. Also, converting a macro with argument to something like "floor": ["\\lfloor#1\\rfloor", 1] seems difficult.

[mmcky]

@patel-zeel are you targeting html, pdf via latex, or both?

If latex you could put it directly in the preamble but to my knowledge there isn't an easy way to do this on the html side. The extra \ is probably one of the most "tricky" parts of python -- but when that string resolves it it is a single \ in the end of the day.

[patel-zeel]

@mmcky We are mostly targeting html version of Jupiter book like this one so we may need to do some automation from scratch. Thank you for your answer :)

[mmcky]

@patel-zeel if it helps here are some definitions we use on quantecon projects in _config.yml

[patel-zeel]

@mmcky This seems very helpful. Thanks for sharing!