cover of Mathematica book (hyperbolic polyhedra)

*To*: mathgroup at smc.vnet.net*Subject*: [mg5776] cover of Mathematica book (hyperbolic polyhedra)*From*: arnold at fermi.phys.washington.edu (Peter Arnold)*Date*: Sat, 18 Jan 1997 14:58:31 -0500*Organization*: University of Washington*Sender*: owner-wri-mathgroup at wolfram.com

Can someone tell me what the hyperbolic polyhedra on the cover of the Mathematica book (2nd edition) and on pp. 34-5 are? In particular, are the spikes really finite, or is this just a graphical interpretation of something infinite? What's the equation? Anyone have a referenence? I ask because some plots I've generated of ceratin properties of ultrarelativistic plasmas look exactly the same, and I'm wondering if they are. (In my case, I don't know what the explicit formula is -- it's the result of numerical integration of something complicated.) Peter Arnold arnold at phys.washington.edu