More on Tie-points and homeomorphism in N^*
| dc.creator | Dow, Alan | |
| dc.creator | Shelah, Saharon | |
| dc.date | 2007-11-19 | |
| dc.date.accessioned | 2026-07-07T08:43:56Z | |
| dc.date.available | 2026-07-07T08:43:56Z | |
| dc.description | A point x is a (bow) tie-point of a space X if X setminus {x} can be partitioned into (relatively) clopen sets each with x in its closure. Tie-points have appeared in the construction of non-trivial autohomeomorphisms of betaN setminus N= N^* and in the recent study of (precisely) 2-to-1 maps on N^*. In these cases the tie-points have been the unique fixed point of an involution on N^*. One application of the results in this paper is the consistency of there being a 2-to-1 continuous image of N^* which is not a homeomorph of N^* . | |
| dc.identifier | https://arxiv.org/abs/0711.3038 | |
| dc.identifier | http://arxiv.org/abs/0711.3038 | |
| dc.identifier | Fund. Math. 203 No. 3 (2009) 191--210 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/142487 | |
| dc.subject | Logic | |
| dc.subject | General Topology | |
| dc.title | More on Tie-points and homeomorphism in N^* | |
| dc.type | text |