
arXiv: math/0403235
The real homology of a compact, n -dimensional Riemannian manifold M is naturally endowed with the stable norm. The stable norm of a homology class is the minimal Riemannian volume of its representatives. If M is orientable the stable norm on H n -1 ( M , [inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="01i" /]) is a homogenized version of the Riemannian ( n -1)-volume. We study the differentiability properties of the stable norm at points α ε H n -1 ( M , [inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="02i" /]). They depend on the position of α with respect to the integer lattice H n -1 ( M , [inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="03i" /]) in H n -1 ( M , [inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="04i" /]). In particular, we show that the stable norm is differentiable at α if α is totally irrational.
Mathematics - Differential Geometry, Mathematics - Analysis of PDEs, Differential Geometry (math.DG), FOS: Mathematics, 49Q20 (Primary) 35B27, 53C38 (Secondary), Analysis of PDEs (math.AP)
Mathematics - Differential Geometry, Mathematics - Analysis of PDEs, Differential Geometry (math.DG), FOS: Mathematics, 49Q20 (Primary) 35B27, 53C38 (Secondary), Analysis of PDEs (math.AP)
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