This paper gives a complement to the proof of our previous papers,which discussed about some properties of the solution curves of a nonlinear equation obtained from F(χ) + Aχ = b by deleting the first equation. The theorem is obtained under the assumption that A is an Ω-matrix. By showing rigorously the proof of the previous papers,we confirthat the solution curves possess neither maximal point nor inflection point with respect to the variable χ_<1>.