RT Journal Article T1 Bounded distortion homeomorphisms on ultrametric spaces A1 Hughes, Bruce A1 Martínez Pérez, Álvaro A1 Alonso Morón, Manuel AB It is well-known that quasi-isometrics between R-trees induce power quasi-symmetric homeomorphisms between their ultrametric end spaces. This paper investigates power quasi-symmetric homeomorphisms between bounded, complete, uniformly perfect, ultrametric spaces (i.e., those ultrametric spaces arising up to similarity as the end spaces of bushy trees). A bounded distortion property is found that characterizes power quasi-symmetric homeomorphisms between such ultrametric spaces that are also pseudo-doubling. Moreover, examples are given showing the extent to which the power quasi-symmetry of homeomorphisms is not captured by the quasiconformal and bi-Holder conditions for this class of ultrametric spaces. PB Suomalainen tiedeakatemia SN 1239-629X YR 2010 FD 2010 LK https://hdl.handle.net/20.500.14352/42143 UL https://hdl.handle.net/20.500.14352/42143 LA eng NO Hughes, B., Martínez Pérez, Á., Alonso Morón, M. «Bounded distortion homeomorphisms on ultrametric spaces». Annales Academiae Scientiarum Fennicae Mathematica, vol. 35, agosto de 2010, pp. 473-92. DOI.org (Crossref), https://doi.org/10.5186/aasfm.2010.3529. NO Organización Para La Salud y Seguridad Pública DS Docta Complutense RD 19 dic 2025