Topic summary

Φ

Extracted from the Wikipedia article Phi.

The cumulative distribution function (cdf) of standard normal distribution in statistics.
The magnetic flux and electric flux in physics, with subscripts distinguishing the two.
Quantum yield, the number of times a specific event occurs per photon absorbed by a system.
In philosophy, Φ is often used as shorthand for a generic act. (Also in lowercase.)
A common symbol for the parametrization of a surface in vector calculus.
In Lacanian algebra, Φ stands for the imaginary phallus and also represents phallic signification; −Φ stands in for castration.
The diameter symbol in engineering, ⌀, is often erroneously referred to as "phi", and the diameter symbol is sometimes erroneously typeset as Φ. This symbol is used to indicate the diameter of a circular section; for example, "⌀14" means the diameter of the circle is 14 units.
The null sign, ∅, which denotes the empty set in mathematics is sometimes also erroneously mistaken for phi.
A clock signal in electronics is often called Phi or uses the symbol.
In emulsion and suspension science, Φ often denotes the volume fraction of the dispersed phase.
Archaically used in chemistry for phenyl group.
Integrated information theory (IIT), a mathematical model for consciousness