Mathematics – Differential Geometry
Scientific paper
2006-11-09
Mathematics
Differential Geometry
12 pages
Scientific paper
Labourie and the author independently showed that a convex real projective structure on an oriented surface of genus at least 2 is equivalent to a conformal structure plus a holomorphic cubic differential U. We analyze the behavior of the real-projective structure as the conformal structure is fixed and the cubic differential is scaled to infinity. In particular, we find the asymptotic eigenvalues of the holonomies around smooth geodesic loops with respect to the flat metric given by the 2/3 power of |U|. If the asymptotic holonomies of all loops could be computed, then that would describe a boundary point in the deformation space of convex real-projective structures, as constructed by Inkang Kim. The proof involves an affine differential geometry of hyperbolic affine 2-spheres due to C.P. Wang, and an analysis of a PDE similar to Mike Wolf's analysis of the harmonic map equation and Thurston's boundary of Teichmuller space.
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