Tau (disambiguation)

This disambiguation page lists articles associated with the same or a similar title.

• Tau (Greek letter) [r]: The 19th letter of the Greek alphabet, written as $\mathrm {T}$ (upper-case) and $\tau$ (lower-case). ^[e]
• Tau function [r]: An arithmetic function studied by Ramanjuan, the coefficients of the q-series expansion of the modular form Delta. ^[e]
• Number of divisors function [r]: The number of positive integer divisors of a given number. ^[e]