LA Maia, JCO Junior, R Ruviaro - Journal of Fixed Point Theory and …, 2016 - infona.pl
The existence of solution of the nonlinear Schrödinger equation $$\begin {aligned}\begin
{array}{lc}-\Delta u+ V (x) u= f (x, u), &\end {array}\end {aligned} $$-Δ u+ V (x) u= f (x, u), is …