What it means
The fifteenth Greek letter. It is almost never used in mathematics because it cannot be told apart from the Latin o. The o in little-o notation, o(n), is a Latin letter.
Read aloud in real formulas
f(n) = o(n)
Aethel says
f of n equals o of n
Latin little-o: f grows more slowly than n
Typing it
- LaTeX
- o (no command; Latin o)
- Unicode
- U+03BF, U+039F
Questions
How do you pronounce omicron (ο)?
It is said “omicron”, roughly OM-ih-kron.
What does ο mean in maths?
The fifteenth Greek letter. It is almost never used in mathematics because it cannot be told apart from the Latin o. The o in little-o notation, o(n), is a Latin letter.
How do you type ο?
In LaTeX, write o (no command; Latin o). Its Unicode code point is U+03BF, U+039F.