Euclidean space
If the points P and Q have coordinates (x1, x2,…, xn), and (y1, y2,…, yn) respectively, then the distance PQ can be defined to be equal to
Sometimes n‐dimensional Euclidean space is denoted as En, signifying that space has no predetermined coordinates, no natural origin or axes. Once an origin, perpendicular axes, and unit length have been decided, coordinates may be assigned and En can now be identified with Rn.
- Thomson, William
- three-body problem
- three-door problem
- thrust
- tie
- tiling
- time
- time dilation
- time series
- Tn
- Tonelli's theorem
- tonne
- topological data analysis
- topological group
- topologically distinguishable
- topological space
- topological vector space
- topology
- toppling
- torque
- torsion
- torsion element
- torus
- torus
- total differential