cases - Mathjax — ContextQMD

.. _tex-cases:

cases

The cases extension implements the cases style package from LaTeX. It provides environments numcases and subnumcases for formulas with separately enumerated cases. See the cases CTAN page <https://www.ctan.org/pkg/cases>__ for more information and documentation.

An example of the numcases environment is:

.. code-block:: latex

\begin{numcases} {|x|=} x, & for $x \geq 0$\ -x, & for $x < 0$ \end{numcases}

.. raw:: html

<p>which renders as:</p>
<p style="background-color: #DDD; padding: 1em 0; text-align: center">
<iframe style='width: 20em; height: 5em; background-color: white' srcdoc='
  <!DOCTYPE html>
  <html>
  <head>
  <title>MathJax numcases Example</title>
  <script>
  MathJax = {
    loader: {load: ["[tex]/cases", "[tex]/empheq"]},
    tex: {packages: {"[+]": ["cases", "empheq"]}, tags: "ams"}
  }
  </script>
  <script defer src="https://cdn.jsdelivr.net/npm/mathjax@4/tex-chtml.js">
  </script>
  </head>
  <body>
  <p>
  \begin{numcases} {|x|=}
    x, & for $x \geq 0$\\
    -x, & for $x < 0$
  \end{numcases}
  </p>
  </body>
  </html>
'></iframe>
</p>

This package is not autoloaded, so you must request it explicitly if you want to use it. To load the cases extension, add '[tex]/cases', '[tex]/empheq' to the :data:load array of the :data:loader block of your MathJax configuration, and add 'cases', 'empheq' to the :data:packages array of the :data:tex block. Note that the :ref:tex-empheq package is required when you load cases.

.. code-block:: javascript

window.MathJax = { loader: {load: ['[tex]/cases', '[tex]/empheq']}, tex: {packages: {'[+]': ['cases', 'empheq']}} };

You can configure the :ref:tex-autoload extension to load cases via

.. code-block:: javascript

window.MathJax = { tex: { autoload: { cases: [[], ['numcases', 'subnumcases']] } } };

Alternatively, use \require{cases} in a TeX expression to load it dynamically from within the math on the page, if the :ref:tex-require extension is loaded.

.. _tex-cases-commands:

cases Commands

The cases extension implements the following macros: &

And the following environments: numcases, subnumcases

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