# Introducing Math

## Introducing Math

By |2015-01-26T22:29:27-08:00January 26th, 2015|

We are creating an annotation technology that can be used to enrich human knowledge. Today we take another step forward: Hypothes.is now supports math typesetting. You can now place beautifully formatted equations and mathematical symbols into annotations.

To use math in your annotations, simply enclose supported LaTeX commands within enclosing $$....$$ for inline math, or $$…$$ for display style math. We’ve also added a handy button to the editor to insert the symbols for you:

Math typesetting is provided by a combination of the new KaTeX library and MathJax. KaTeX has the benefits of being lightweight, working for a large portion of math, and rendering extremely fast. The drawback is that it lacks many of the LaTeX commands supported by MathJax. Our implementation loads MathJax if a command is present that KaTeX doesn’t support, and uses that for rendering that particular equation. The combination results in math typesetting that is both very fast and supports a wide variety of math!

We’re excited to see how the addition of math will increase the richness of online commentary and discussion on the annotated Web. We’d like to give a special thank you to Peter Krautzberger at Mathjax, who’s excellent software library and thoughtful advice have been an essential part of this effort.

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