What it means
The fourteenth Greek letter, often hard to write and to say. It stands for a random variable, a coordinate or, in engineering, the damping ratio.
Read aloud in real formulas
E[ξ] = 0
Aethel says
the expected value of xi, equals 0
a random variable with mean zero
ξ < 1
Aethel says
xi is less than 1
an underdamped system
Typing it
- LaTeX
- \xi, \Xi
- Unicode
- U+03BE, U+039E
Formulas that use it
Questions
How do you pronounce xi (ξ)?
It is said “xi”, roughly KSY or ZY (rhymes with "sky"), also KSEE.
What does ξ mean in maths?
The fourteenth Greek letter, often hard to write and to say. It stands for a random variable, a coordinate or, in engineering, the damping ratio.
How do you type ξ?
In LaTeX, write \xi, \Xi. Its Unicode code point is U+03BE, U+039E.