User blog comment:Ynought/Extended array hierarchy/@comment-35470197-20190117222337/@comment-36957202-20190123133711

> Also, how many times is \((a+I_a,\ldots,b_+I_b)_{(c+I_c,+\ldots,d-1)}\) repeated in the right hand side?

every variable "\(v_k\)" on the right hand side except the last gets replaced by \(v_k+I_{v_k}\)