We prove that a complete embedded maximal surface in L 3 with a finite number of singularities is an entire maximal graph with conelike singularities over any spacelike plane, and so, it is asymptotic to a spacelike plane or a half catenoid.We show that the moduli space Gn of entire maximal graphs over {x3 = 0} in L 3 with n + 1 ≥ 2 singular points and vertical limit normal vector at infinity is a 3n + 4-dimensional differentiable manifold. The convergence in Gn means the one of conformal structures and Weierstrass data, and it is equivalent to the uniform convergence of graphs on compact subsets of {x3 = 0}. Moreover, the position of the singular points in R 3 and the logarithmic growth at infinity can be used as global analytical coordinates with the same underlying topology. We also introduce the moduli space Mn of marked graphs with n + 1 singular points (a mark in a graph is an ordering of its singularities), which is a (n + 1)-sheeted covering of Gn. We prove that identifying marked graphs differing by translations, rotations about a vertical axis, homotheties or symmetries about a horizontal plane, the corresponding quotient spacê Mn is an analytic manifold of dimension 3n−1. This manifold can be identified with a spinorial bundle Sn associated to the moduli space of Weierstrass data of graphs in Gn.
Notations and Preliminary results
.Since M is spacelike, then |g| = 1 on M.Remark 2.1 For convenience, we also deal with surfaces M having ∂(M ) = ∅, and in this case, we always suppose that φ 3 and g extend analitically beyond ∂M.Conversely, let M, g and φ 3 be a Riemann surface with possibly non empty boundary, a meromorphic map on M and an holomorphic 1-form φ 3 on M, such that |g(P )| = 1, ∀P ∈ M, and the 1-forms φ j , j = 1, 2, 3 defined as above are holomorphic, have no real periods and have no common zeroes.