FYI: a nice interactive... Digital Document

I do not know whether it is a Portable Digital Document, though… But a great example for things that can be done. Lots of MathJax, Peter:-)


> 
> Here is another example:
> immersive linear algebra
> by J. Ström, K. Åström, and T. Akenine-Möller
> ISBN: 978-91-637-9354-7
> 
> http://immersivemath.com/ila/index.html <http://immersivemath.com/ila/index.html>
> 


Ivan

----
Ivan Herman, W3C
Digital Publishing Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
ORCID ID: http://orcid.org/0000-0003-0782-2704