A motivated proof of the MacWilliams Identity
Wildon's Weblog 2018-03-12
Summary:
Fix and let . Let denote the weight of , defined by . Given a subset of , we define its weight enumerator by The MacWilliams Identity states that if is a linear subspace of , and is its orthogonal complement with respect to the dot product then The MacWilliams Identity is important in coding […]