centernot - Mathjax — ContextQMD

.. _tex-centernot:

######### centernot #########

The centernot extension implements the centernot style package from LaTeX. It provides the \centernot command which can be used as a replacement of the standard \not command and generally leads to a better alignment of the slash with the operator it negates. This can be observed with the following two examples:

.. code-block:: latex

\begin{array}{c} A \not\longrightarrow B\ A \centernot\longrightarrow B \end{array}

.. code-block:: latex

\begin{array}{c} A \nparallel B\ A \not\parallel B\ A \centernot\parallel B \end{array}

.. raw:: html

<p>These render as follows:</p>
<p style="background-color: #DDD; padding: 1em 0; text-align: center">
<iframe style='width: 20em; height: 12em; background-color: white' srcdoc='
  <!DOCTYPE html>
  <html>
  <head>
  <title>MathJax centernot Examples</title>
  <script>
  MathJax = {
    loader: {load: ["[tex]/centernot"]},
    tex: {packages: {"[+]": ["centernot"]}}
  }
  </script>
  <script defer src="https://cdn.jsdelivr.net/npm/mathjax@4/tex-chtml.js">
  </script>
  </head>
  <body>
  $$\begin{array}{c}
    A \not\longrightarrow B\\
    A \centernot\longrightarrow B
  \end{array}$$
  $$\begin{array}{c}
    A \nparallel B\\
    A \not\parallel B\\
    A \centernot\parallel B
  \end{array}$$
  </body>
  </html>
'></iframe>
</p>

See also the centernot CTAN page <https://www.ctan.org/pkg/centernot>__ for more information and documentation.

In addition to \centernot the package also implements the non-standard \centerOver.

.. describe:: \centerOver{symbol1}{symbol2}

Overlays ``symbol2`` centered on top of ``symbol1``.  The result
has the width and TeX class of ``symbol1``.

For example, the following produces a circle around a triangle:

.. code-block::

\centerOver{\bigcirc}{\small\triangle}

.. raw:: html

<p>This renders between two *x* as follows:</p>
<p style="background-color: #DDD; padding: 1em 0; text-align: center">
<iframe style='width: 10em; height: 4em; background-color: white' srcdoc='
  <!DOCTYPE html>
  <html>
  <head>
  <title>MathJax centerOver Example</title>
  <script>
  MathJax = {
    loader: {load: ["[tex]/centernot"]},
    tex: {packages: {"[+]": ["centernot"]}}
  }
  </script>
  <script defer src="https://cdn.jsdelivr.net/npm/mathjax@4/tex-chtml.js">
  </script>
  </head>
  <body>
  $$x \centerOver{\bigcirc}{\small\triangle} x$$
  </body>
  </html>
'></iframe>
</p>

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

.. code-block:: javascript

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

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

.. code-block:: javascript

window.MathJax = { tex: { autoload: { centernot: ['centernot', 'centerOver'] } } };

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

.. _tex-centernot-commands:

centernot Commands

The centernot extension implements the following macros: \centernot, \centerOver

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