Divide -- the class of all divide expressions

Methods that use a divide expression:

• denominator(Divide) -- see denominator -- denominator of a fraction
• numerator(Divide) -- see numerator -- numerator of a fraction
• reduceHilbert(Divide) -- see reduceHilbert -- reduce a Hilbert series expression

For the programmer

The object Divide is a header type, with ancestor classes Expression < BasicList < Thing.