Span, chainability and the continua H* and I_u
arXiv:math/0308162 · doi:10.1016/j.topol.2004.03.007
Abstract
We show that the continua I_u and H* are non-chainable and have span nonzero. Under CH this can be strengthened to surjective symmetric span nonzero. We discuss the logical consequences of this.
2004-03-11: corrected some typos, some parts rewritten