Normalized solutions for critical Choquard equations involving logarithmic nonlinearity in the Heisenberg group

In this paper, we consider the existence and multiplicity of normalized solutions for critical Choquard equations involving logarithmic nonlinearity in the Heisenberg group. Under suitable assumptions, combined with the truncation technique, the concentration‐compactness principle, and the genus theory, we obtain the existence and multiplicity of the normalized solutions in the ‐subcritical case. As far as we know, the result of the paper is completely new in the Euclidean case.