Conference paper
Wavefront and caustic surfaces of refractive laser beam shaper
David L. Shealy, John A. Hoffnagle
SPIE Optical Engineering + Applications 2007
We consider the problem of when does a positive entropy topological system have a continuous factor with strictly smaller entropy. In many cases it is shown that such small entropy factors exist. On the other hand, classes of examples are given where differentiable factors must preserve some of the original entropy. © 1991, Cambridge University Press. All rights reserved.
David L. Shealy, John A. Hoffnagle
SPIE Optical Engineering + Applications 2007
Heng Cao, Haifeng Xi, et al.
WSC 2003
Sankar Basu
Journal of the Franklin Institute
Peter Wendt
Electronic Imaging: Advanced Devices and Systems 1990