pyphi.display.description.system_phi_label#

pyphi.display.description.system_phi_label(config)[source]#

The label for a system irreducibility value under config’s formalism.

Under IIT 3.0 the system-level irreducibility value is big phi, so it is labelled Φ. Under IIT 4.0 it is φₛ, and Φ names a different quantity — the structure integrated information, the sum of φ over the Φ-structure’s distinctions and relations. Labelling φₛ as Φ under IIT 4.0 reports one quantity as if it were the other.

Parameters:: config (ConfigSnapshot or None) – The snapshot carried by the result being displayed. None falls back to the IIT 4.0 label.
Returns:: str – "Φ" under IIT 3.0, "φ_s" otherwise.
Return type:: str