{ "id": "1108.1641", "version": "v4", "published": "2011-08-08T09:10:42.000Z", "updated": "2015-05-28T03:37:15.000Z", "title": "Constant mean curvature surfaces in hyperbolic 3-space via loop groups", "authors": [ "Josef F. Dorfmeister", "Jun-ichi Inoguchi", "Shimpei Kobayashi" ], "comment": "37 pages, 4 figures. v3: Various typos fixed. v4: Proposition D.1 has been fixed", "categories": [ "math.DG" ], "abstract": "In hyperbolic 3-space $\\mathbb{H}^3$ surfaces of constant mean curvature $H$ come in three types, corresponding to the cases $0 \\leq H < 1$, $H = 1$, $H > 1$. Via the Lawson correspondence the latter two cases correspond to constant mean curvature surfaces in Euclidean 3-space $\\mathbb{E}^3$ with H=0 and $H \\neq 0$, respectively. These surface classes have been investigated intensively in the literature. For the case $0 \\leq H < 1$ there is no Lawson correspondence in Euclidean space and there are relatively few publications. Examples have been difficult to construct. In this paper we present a generalized Weierstra{\\ss} type representation for surfaces of constant mean curvature in $\\mathbb{H}^3$ with particular emphasis on the case of mean curvature $0\\leq H < 1$. In particular, the generalized Weierstra{\\ss} type representation presented in this paper enables us to construct simultaneously minimal surfaces (H=0) and non-minimal constant mean curvature surfaces ($0