Mathematics – Differential Geometry
Scientific paper
2006-11-16
Int. Math. Res. Not. IMRN 2008, Art. ID rnn 068, 44 pp.
Mathematics
Differential Geometry
26 pages, no figure. v2: added 2 refs, improved intro. v3: added section on low dim examples
Scientific paper
The classical Schl\"afli formula, and its ``higher'' analogs given in [SS03], 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.
Schlenker Jean-Marc
Souam Rabah
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