2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76994We give an example of a totally disconnected set E in R^3 which is not removable for quasiconformal homeomorphisms, i.e., there is a homeomorphism f of R^3 to itself which is quasiconformal off E, but not quasiconformal on all of R^3. The set E may be taken with Hausdorff dimension 2. The construction also gives a non-removable set for locally biLipschitz homeomorphisms.29 Pages, 39 PostScript figuresComplex VariablesClassical Analysis and ODEs30C65text