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

Quadratic formula

... described by the quadratic equation touches the x-axis in a single point.) If the discriminant is positive, then there are two different solutions x, both of which are ...