What it means
The ninth Greek letter, rarely used because it looks so much like a Latin i or l. It appears for inclusion maps in algebra and topology.
Read aloud in real formulas
ι(x) = x
Aethel says
iota of x equals x
an inclusion map sends each element to itself
Typing it
- LaTeX
- \iota (capital: I)
- Unicode
- U+03B9, U+0399
Questions
How do you pronounce iota (ι)?
It is said “iota”, roughly eye-OH-tuh.
What does ι mean in maths?
The ninth Greek letter, rarely used because it looks so much like a Latin i or l. It appears for inclusion maps in algebra and topology.
How do you type ι?
In LaTeX, write \iota (capital: I). Its Unicode code point is U+03B9, U+0399.