Stilb (unit) Stilb (unit) The stilb (sb) is the CGS unit of luminance for objects that are not self-luminous. It is equal to one candela per square centimeter or 10 nits (candelas per square meter). The name was coined by the French physicist André Blondel around 1920. It comes from the Greek word "stilbein" meaning "to glitter". It was in common use in Europe up to World War I. In North America self-explanatory terms such as candle per square inch and candle per square meter were more common. The unit has since largely been replaced by the SI unit: candela per square
Pushforward measure Pushforward measure In measure theory, a discipline within mathematics, a pushforward measure (also push forward, push-forward or image measure) is obtained by transferring ("pushing forward") a measure from one measurable space to another using a measurable function. Given measurable spaces formula_1 and formula_2, a measurable mapping formula_3 and a measure formula_4, the pushforward of formula_5 is defined to be the measure formula_6 given by This definition applies "mutatis mutandis" for a signed or complex measure. The pushforward measure is also denoted as formula_9, formula_10, or formula_11. Theorem: A measurable function "g" on "X" is integrable with respect to the pushforward