ABSTRACT
Condition (F ) . For a function F there exists a function K ( V x , u , x ) such that i f (u(J) > 0 and F ^ 0, then
w ^ K ( V u , u , x ) (2)
with w = det (u^ ).
As usual, it suffices to restrict ourselves to the values of u,, u and x for the solutions being estimated (see, Subsection 6 of § 2).
