Tau
τ
Type it
| Unicode | U+03C4 | |
|---|---|---|
| LaTeX | \tau | |
| HTML entity | τ | |
| Character | τ |
Meaning
The nineteenth letter of the Greek alphabet. It often stands for torque, a time constant, or a topology, and is sometimes used for the full-turn constant 2π. Compare with Pi and Rho.
How to read it
τ = 2π
is read “tau equals two pi”.