Stilb (unit) meter. The current national standard for SI in the United States discourages the use of the stilb. formula_1 formula_2 formula_3 formula_4 formula_5 Other units of luminance: 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
Measure (mathematics) if is a finite real number (rather than ∞). Nonzero finite measures are analogous to probability measures in the sense that any finite measure is proportional to the probability measure formula_15. A measure is called "σ-finite" if can be decomposed into a countable union of measurable sets of finite measure. Analogously, a set in a measure space is said to have a "σ-finite measure" if it is a countable union of sets with finite measure. For example, the real numbers with the standard Lebesgue measure are σ-finite but not finite. Consider the closed intervals for all integers ; there are