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math.CA2015
On the piecewise approximation of bi-Lipschitz curves
Aldo Pratelli, Emanuela Radici
In this paper we deal with the task of uniformly approximating an -biLipschitz curve by means of piecewise linear ones. This is rather simple if one is satisfied to have approxi…
math.OC2015
Regularity of isoperimetric sets in with density
Eleonora Cinti, Aldo Pratelli
We consider the isoperimetric problem in with density for the planar case . We show that, if the density is , then the boundary of any isoperimetr…
math.CA2015
Diffeomorphic Approximation of Planar Sobolev Homeomorphisms
Stanislav Hencl, Aldo Pratelli
Let be a domain and let be a homeomorphism (between and ). Then there exists a sequence of smooth diffeomorphisms $f…