This is documentation for Mathematica 4, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

NumeratorPart

Denominator

FilledSmallSquareDenominator[expr] gives the denominator of expr.

FilledSmallSquareDenominator picks out terms which have superficially negative exponents. Numerator picks out all remaining terms.

FilledSmallSquare An exponent is "superficially negative" if it has a negative number as a factor.

FilledSmallSquare The standard representation of rational expressions as products of powers means that you cannot simply use Part to extract denominators.

FilledSmallSquareDenominator can be used on rational numbers.

FilledSmallSquare See The Mathematica Book: Section 1.4.7.

FilledSmallSquare See also: ExpandDenominator, Rationals.

Further Examples

NumeratorPart