Compactness Theorem
Inside a Ball 
in 
,
is compact under the Flat Norm.
References
Morgan, F. ``What Is a Surface?'' Amer. Math. Monthly 103, 369-376, 1996.
- Tetrahedral Number
- Tetrahedral Surface
- Tetrahedroid
- Tetrahedron
- Tetrahedron 10-Compound
- Tetrahedron 5-Compound
- Tetrahedron Inscribing
- Tetrahemihexacron
- Tetrahemihexahedron
- Tetrakaidecagon
- Tetrakaidecahedron
- Tetrakis Hexahedron
- Tetranacci Number
- Tetrix
- Tetromino
- Thales' Theorem
- Theorem
- Theorema Egregium
- Theta Function
- Theta Operator
- Theta Subgroup
- Thiele's Interpolation Formula
- Thiessen Polytope
- Third Curvature
- Thirteenth