Encyclopedia > Phi (letter)

Article Content

Phi (letter)

Phi (Φ φ) is the 21st letter of the Greek alphabet and has a numeric value of 500.

The lower-case letter φ is used as a symbol for:

Euler's phi function φ(n)
The golden mean.
In physics and mathematics, the value of an angle.
The work function.
The empty set.
In signal processing, the phase of a sinusoidal[?] signal.

The upper-case letter Φ is used as a symbol for:

magnetic flux

See also other things named phi, Phi phenomenon.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Rameses

... also spelled Rameses, is the name of several Egyptian pharaohs: Ramses I[?] Ramses II ("The Great") Ramses III Ramses IV[?] The name means "Child of the Sun". ...