• C++ implementation
• C++ implementation (parallelized)
• FPGA implementation
• approximate the given network by a similar network whose PHI can be calculated analytically
• quickPHI heuristics
• Exploit properties of the connected graph -- i.e: symmetry.

Relevant Papers

Name	Size	Modified	Comment
10799.pdf	312k	2007-10-22	Seth et al. PNAS criticism of NeuralComplexity, PHI, and Causal Density.
tononi-04.pdf	1028k	2007-10-22	Tononi. Specification of PHI.