# Proper term for a sequence that is the sequence of sums of each positional element in two sequences?

Is there a proper English term for Z in this example?

a = [ 1, 2, 4 ]

b = [ 1, 1, 1 ]

Z = [ 2, 3, 5 ]

-
I'd assume "set sum" would be a sufficient term to describe Z. – Neil May 18 '11 at 13:33
@Neil: that's a fairly confusing term. What is "set" describing? – Qiaochu Yuan May 18 '11 at 13:47
what you describe are not sets. In mathematical parlance, sets have distinct elements. – Qiaochu Yuan May 18 '11 at 13:47
Also generally sets are not ordered. I would call them sequences, then Z is the sum of sequences a and b. – Ross Millikan May 18 '11 at 13:51
Or vectors? Sum of vectors? – Fabian May 18 '11 at 14:03

You can say that $Z$ is the "pointwise sum of $a$ and $b$" or "coordinate-wise sum".