e/Exponential formula

Information
has gloss	eng: In combinatorial mathematics, the exponential formula (called the polymer expansion in physics) states that the exponential generating function for structures on finite sets is the exponential of the exponential generating function for connected structures. Definition For any formal power series of the form
lexicalization	eng: exponential formula
instance of	(noun) a function in which an independent variable appears as an exponent exponential function, exponential