Artificial Intelligence, Data Science, Machine Learning, Graph, Neo4j.
for every term of the summation. δ(c₁,c₂) is 0 as initially, the 2 nodes don’t belong to the same community, hence the entire summation term becomes 0! For the term (A₁₁ — k₁k₁/2m) x δ(c₁,c₁), A₁₁=0 as there is no self-edge for node 1 to itself. In fact, all the Aᵢᵢ = 0 as there exists no self-edge