What is "additive group"

n. 1 (context mathematics English) An abelian group, when it is written using the symbol '''+''' for its binary operation 2 (context mathematics English) The '''underlying group under addition''' of a field, ring, vector space or other structure having addition as one of its operations 3 (context mathematics English) A group scheme representing the underlying-additive-group functor.

1. redirect additive group