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66 lines
2.2 KiB
ReStructuredText
66 lines
2.2 KiB
ReStructuredText
.. _typesetting_math:
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Typesetting Math in e-books
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============================
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The calibre E-book viewer has the ability to display math embedded in e-books
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(EPUB and HTML files). You can typeset the math directly with TeX or MathML or
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AsciiMath. The calibre E-book viewer uses the excellent `MathJax
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<https://www.mathjax.org>`_ library to do this. This is a brief tutorial on
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creating e-books with math in them that work well with the calibre E-book viewer.
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A simple HTML file with mathematics
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-------------------------------------
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You can write mathematics inline inside a simple HTML file and the calibre E-book viewer
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will render it into properly typeset mathematics. In the example below, we use
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TeX notation for mathematics. You will see that you can use normal TeX
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commands, with the small caveat that ampersands and less than and greater than
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signs have to be written as & < and > respectively.
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The first step is to tell calibre that this will contains maths. You do this by
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adding the following snippet of code to the <head> section of the HTML file::
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<script type="text/x-mathjax-config"></script>
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That's it, now you can type mathematics just as you would in a .tex file. For
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example, here are Lorentz's equations::
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<h2>The Lorenz Equations</h2>
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<p>
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\begin{align}
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\dot{x} & = \sigma(y-x) \\
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\dot{y} & = \rho x - y - xz \\
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\dot{z} & = -\beta z + xy
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\end{align}
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</p>
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This snippet looks like the following screen shot in the calibre E-book viewer.
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.. figure:: images/lorentz.png
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:align: center
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:guilabel:`The Lorenz Equations`
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The complete HTML file, with more equations and inline mathematics is
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reproduced below. You can convert this HTML file to EPUB in calibre to end up
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with an e-book you can distribute easily to other people.
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.. only:: online
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Here is the generated EPUB file: `mathjax.epub <_static/mathjax.epub>`_.
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.. literalinclude:: mathjax.html
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:language: html
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More information
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-----------------
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Since the calibre E-book viewer uses the MathJax library to render mathematics, the best
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place to find out more about math in e-books and get help is the `MathJax
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website <https://www.mathjax.org>`_.
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