In general, the sequence of labels may contain duplicate values. This complicates the picture.
For now, let's focus on the normal case, where the labels are unique.
Def: a Series is **functional** if its labels are unique.
A functional Series obviously gives a function from labels to values, which permits us to make this equivalent definition:
Def: a **functional Series** is a function over a finite, totally ordered domain.
For now, let's focus on the normal case, where the labels are unique.
Def: a Series is **functional** if its labels are unique.
A functional Series obviously gives a function from labels to values, which permits us to make this equivalent definition:
Def: a **functional Series** is a function over a finite, totally ordered domain.
Version 2.1.8p2
