Ττ
MATHEMATICS
- Constant/characteristic time (applications).
- Topology notation (τ) in some texts.
PROBABILITY
- Less common; appears in specific models.
- Parameter/threshold in certain constructions.
STATISTICS
- Kendall's τ (rank correlation).
- Common in nonparametric statistics.
PRONUNCIATION
- Ancient Greek
- sound [t]
- Modern Greek
- ταυ [taf] · sound [t]
IN FORMULAS
- τ = (C − D) / (n(n − 1)/2)Kendall's tau: concordant minus discordant pairs, over all pairs.See it explained at morrisonkuhlsen.com →
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lowercase
uppercasesame as the Latin letter: LaTeX has no command for it
Note: notations vary between books/fields; these are the most common usages.