gives the denominator of expr.
Details and Options
- Denominator picks out terms which have superficially negative exponents. Numerator picks out all remaining terms.
- An exponent is "superficially negative" if it has a negative number as a factor.
- The standard representation of rational expressions as products of powers means that you cannot simply use Part to extract denominators.
- Denominator can be used on rational numbers.
Introduced in 1988