http://ab-initio.mit.edu/wiki/index.php/Yee_lattices
http://en.wikipedia.org/wiki/Image:Yee-cube.svg
http://upload.wikimedia.org/wikipedia/en/d/d3/Yee-cube.svg
http://en.wikipedia.org/wiki/Finite-difference_time-domain_method
Computational Topology and Its Applications to Scientific Computing
http://www.iue.tuwien.ac.at/personal/jbcurrent/content/staff/Spevak.html
Thank to Yakupov Marat for the interesting reference.
MIT sketching
http://www.youtube.com/watch?v=NZNTgglPbUA&NR
ignat