with Amihai Silverman and Yoel Koenka
background material from projects with R.Kalish, A. Hoffmann, J. Zaffran, T. Mutat, M. Sheintuch, P. Pine, O. Cohen, A. Sorkin, and Y. Yaish
These slides online at http://phycomp.technion.ac.il/~phr76ja/2011talks/athens11/talktitle.html