One of the most awesome achievements of InformationTheory:  how to quantify the complexity of a series.  Originated by AndreKolmogorov.

There is an informative description on wikipedia here:
* http://en2.wikipedia.org/wiki/Algorithmic_information_theory

*http://en.wikipedia.org/wiki/Kolmogorov_complexity

To repeat said information goes against the fundamental grain of said theory.

GregoryChaitin's works are required reading.  


-- LucasAckerman