Today's remedial reading: http://nesl.ee.ucla.edu/pw/ee206a/Gupta_InfoTheory00.pdf While I had read and internalized much of this paper 10 (?) years ago, a grad student here, anastasios giovanidis (see: http://www.zib.de/giovanidis/ and http://arxiv.org/abs/0908.2542 ) re-pointed me at it, and it was enlightening to start with that and work forward into the relevant cites (sharing my notes as I work up this talk...) -- Dave Täht