An upper bound for the least energy of a sign-changing solution to a zero mass problem

Mónica Clapp, Liliane A. Maia, Benedetta Pellacci

We give an upper bound for the least energy of a sign-changing solution to the the nonlinear scalar field equation $$-\Delta u=f(u),u\in D^{1,2}({\mathbb{R}}^N),$$ where $N\geq…