Lighting a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m). The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m. The amount of useful light emitted from a source or the luminous flux is measured in lumen (lm). The SI unit of illuminance and luminous emittance, being the luminous power per area, is measured in Lux. It is used in photometry as a measure of the intensity, as perceived by the human eye, of light that hits or passes
Convex measure "μ" is the push-forward on "ν" under a linear or affine map and formula_8 is a convex function, where Convex measures also satisfy a zero-one law: if "G" is a measurable additive subgroup of the vector space "X" (i.e. a measurable linear subspace), then the inner measure of "G" under "μ", must be 0 or 1. (In the case that "μ" is a Radon measure, and hence inner regular, the measure "μ" and its inner measure coincide, so the "μ"-measure of "G" is then 0 or 1.) Convex measure In measure and probability theory in mathematics, a convex measure is