A typical mobile citizens band radio Citizens band radio (CB radio or CB) is a system of shor- distance radio communication between individuals on a selection of 40 channels within the single 27 MHz (11 meter) band. ... Simulcast is a contraction of simultaneous broadcast, and refers to programs or events broadcast across more than one medium at the same time. ...
In geometry, a simplex or n-simplex is an n-dimensional analogue of a triangle.
For example, a 0-simplex is a point, a 1-simplex is a line segment, a 2-simplex is a triangle, a 3-simplex is a tetrahedron, and a 4-simplex is a pentachoron (in each case with interior).
Such a general simplex is often called an affine n-simplex, to emphasize that the canonical map is an affine transformation.