Maxima Function
join (l, m)
Creates a new list containing the elements of lists l and m, interspersed.
The result has elements [l[1], m[1], l[2], m[2], ...]
.
The lists l and m may contain any type of elements.
If the lists are different lengths, join
ignores elements of the longer list.
Maxima complains if l or m is not a list.
Examples: