Abstract.
For n≥7, it is shown how to construct examples of smooth, compact Riemannian manifolds (N n +1,g), with non-trivial n dimensional integer homology, such that for some Γ∈H n (N,Z), the hypersurface (n-current) M, which minimizes area among all hypersurfaces representing Γ, has singularities. The singular set of M consists of two isolated points, and the tangent cone at these points can be prescribed as any strictly stable, strictly minimizing, regular cone. To my knowledge these are the first examples of codimension one homological minimizers with singularities.
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Oblatum: 3-I-1997 & 13-II-1998 / Published online: 18 September 1998
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Smale, N. Singular homologically area minimizing surfaces of codimension one in Riemannian manifolds. Invent math 135, 145–183 (1999). https://doi.org/10.1007/s002220050282
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DOI: https://doi.org/10.1007/s002220050282