Alex Carter was supported in part by EPSRC grant EP/G006377/1. Steven Hurder was supported in part by NSF Grant 0406254.
History
Publisher Statement
NOTICE: this is the author’s version of a work that was accepted for publication in Topology and Its Applications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Topology and Its Applications,158 (11), 2011 DOI: 10.1016/j.topol.2011.04.010
The original publication is available at www.elsevier.com.