preprint
Inserted: 17 jul 2018
Year: 2013
Abstract:
We study conformal metrics on $R^3$, i.e., metrics of the form
$g_u=e^{2u}
dx
^2$, which have constant $Q$-curvature and finite volume. This
is equivalent to studying the non-local equation $$ (-\Delta)\frac32 u = 2
e{3u}$$ in $R^3$ $$V:=\int{\mathbb{R}3}e{3u}dx<\infty,$$ where $V$ is the
volume of $g_u$. Adapting a technique of A. Chang and W-X. Chen to the
non-local framework, we show the existence of a large class of such metrics,
particularly for $V\le 2\pi^2=
S^3
$. Inspired by previous works of C-S. Lin
and L. Martinazzi, who treated the analogue cases in even dimensions, we
classify such metrics based on their behavior at infinity.