Ιι

IOTA

ἰῶτα · [i]

The 9th letter of the Greek alphabet.

MATHEMATICS

  • Rare notation today; may indicate inclusion/index.
  • Sometimes used for a small operator/quantity.

PROBABILITY

  • Seldom used; depends on the author.

STATISTICS

  • Seldom used; if present, usually local convention.

PRONUNCIATION

Ancient Greek
sound [i]
Modern Greek
γιώτα [ˈʝota] · sound [i]

HOW TO WRITE IT — click to copy

lowercase
uppercasesame as the Latin letter: LaTeX has no command for it

DON'T CONFUSE IT

  • ι i l ı ι (iota) is short and has no dot; ı is the Turkish dotless i, a Latin letter.

Note: notations vary between books/fields; these are the most common usages.