Small+quantity
131Differential of a function — For other uses of differential in mathematics, see differential (mathematics). In calculus, the differential represents the principal part of the change in a function y = ƒ(x) with respect to changes in the independent variable. The… …
132Gilding — is the art of applying a thin layer of gold, simulated gold, or other metal to a surface. Products employed may be real gold leaf ranging in karats from 9 up to 24; imitation leaf composition gold, Dutch metal leaf, aluminum leaf, copper leaf;… …
