Bochner Identity
For a smooth Harmonic Map 
,
where
is the Gradient, Ric is the Ricci Tensor, and Riem is the Riemann Tensor.
References
Eels, J. and Lemaire, L. ``A Report on Harmonic Maps.'' Bull. London Math. Soc. 10, 1-68, 1978.
- Tschirnhausen Cubic Pedal Curve
- Tschirnhausen Transformation
- Tubular Neighborhood
- Tucker Circles
- Tukey's Biweight
- Tukey's Trimean
- Tunnel Number
- Turbine
- Turing Machine
- Turning Angle
- Turán Graph
- Turán's Inequalities
- Turán's Theorem
- Tutte Polynomial
- Tutte's Graph
- Tutte's Theorem
- Twin Peaks
- Twin Prime Conjecture
- Twin Primes
- Twin Primes Constant
- Twins
- Twirl
- Twist
- Twisted Chevalley Groups
- Twisted Conic