Figure 3From: The divergence theorem of a triangular integralA lower-left piece of a divided area Δ 2 σ k , j → . A lower-left finite area element vector Δ 2 σ k , j → is disintegrated into two parts, </p><p></p><p> for j=1,2,…,k and k=1,2,…,n.Back to article page