High-gain omnidirectional antennas are generally realized using collinear dipole arrays. Four distinct points can either be collinear, coplanar or determine the entire space. These three attributes&colon; origin, marque and performance are said to be collinear or non-orthogonal. Consider two dipole antennas placed in a line end-to-end, or "collinear". Only sound with parallel collinear phase velocity vectors interfere to produce this nonlinear effect. This is an affine transformation that transforms collinear points into collinear points. The coaxial collinear (COCO) antenna uses transposed coaxial sections to produce in-phase half-wavelength radiators. One or more unique polar axes could be made through two such collinear unmoved points. There is equality if the vectors formula 29 and formula 30 are collinear. One notes that for collinear velocities, formula 105. Three distinct points are either collinear or determine a unique plane. This model, first proposed in 1951, considers bonding of three collinear atoms. If the collinear edges are joined together a pentagram is produced. This measurement is made in a collinear direction with the flow. Collinear arrays are high gain omnidirectional antennas.