Normalized solutions for a biharmonic Choquard equation with exponential critical growth in ${\mathbb{R}}^4$

Wenjing Chen, Zexi Wang

In this paper, we study the following biharmonic Choquard type equation \begin{align*} \begin{split} \left\{ \begin{array}{ll} γΔ^2u-βΔu=λu+(I_μ*F(u))f(u), \quad\mbox{in}\ \ \mathb…