A convex function is a real-valued function defined on an interval with the property that its epigraph (the set of points on or above the graph of the function) is a convex set.
A rectifier is a electrical device that converts alternating current to direct current, a process known as rectification. Rectifiers are used as components of power supplies and as detectors of radio signals. Rectifiers may be made of solid state diodes, vacuum tube diodes, mercury arc valves, and other technologies.
rectifier (rekÂ´tifÄ«ur) , n a device used for converting an alternating current to a direct current; it also prevents or limits the flow of current in the opposite direction. rectifier, full-wave, n an apparatus for rectifying the entire wave of an alternating current in a radiography machine by means of a mechanical rectifier or valve tube. rectifier, half-wave, n an apparatus used in the rectifying of half of the sine wave in a radiography unit.