In the book it is stated “In fact, the meaning comes from mathematics where map refers to “an operation that associates each element of a given set with one or more elements of a second set”.” This is in general not the case, as maps are normally defined as an operation that associate each element of a given set with exactly one element of a second set. This second set can be of higher dimension than the first set, but the mapping is still unique.
In the book it is stated “In fact, the meaning comes from mathematics where map refers to “an operation that associates each element of a given set with one or more elements of a second set”.” This is in general not the case, as maps are normally defined as an operation that associate each element of a given set with exactly one element of a second set. This second set can be of higher dimension than the first set, but the mapping is still unique.