Higher Schläfli Formulas and Applications. II: Vector-Valued Differential Relations
1 Institut de Mathématiques de Toulouse, UMR CNRS 5219, Université Toulouse III, 31062 Toulouse Cedex 9, France
2 Institut de Mathématiques de Jussieu, CNRS UMR 7586, Université Paris Diderot - Paris 7, Géométrie et Dynamique, Site Chevaleret, Case 7012, 75205 - Paris Cedex 13, France
Correspondence: Correspondence to be sent to: schlenker{at}math.ups-tlse.fr
The classical Schläfli formula, and its "higher" analogs given in [23], are relations between the variations of the volumes and "curvatures" of faces of different dimensions of a polyhedra (which can be Euclidean, spherical, or hyperbolic) under a first-order deformation. We describe here analogs of those formulas which are vector-valued rather than scalar. Some consequences follow, for instance constraints on where cone singularities can appear when a constant curvature manifold is deformed among cone-manifolds.
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