vector | Vector (epidemiology) | Euclidean vector | Vector graphics | Vector | KK Null | Vector Motors | Unter Null | Null Device | vector processor | vector field | Vector autoregression | /dev/null | Advanced Vector Extensions | Vector NTI | Vector Limited | vector (geometric) | Vector Field Histogram | vector calculus | Vector (band) | Unit vector | Poynting vector | Null result | $null | null | Killing vector field | Greater Los Angeles County Vector Control District | Greater los Angeles County Vector Control District | Dimension (vector space) | Christopher Null |
At some typical boundary regions such as null infinity, timelike infinity, spacelike infinity, black hole horizons and cosmological horizons, null tetrads adapted to spacetime structures are usually employed to achieve the most succinct Newman-Penrose descriptions.