No documentation. No documentation. r_2(k-1,j) r_1(j,j) x_3(k,j-1,j) x_1(k,j) r_3(k-1,j,i) r_1(j,i) x_3(k,j-1,i) x_1(k,i) t_2(k,j,i-1) t_1(k,j) r_2(K,j) r_3(K,j,i)