English

Fixed points in non-invariant plane continua

General Topology 2016-01-25 v2

Abstract

If f:[a,b]Rf:[a,b]\to \mathbb{R}, with a<ba<b, is continuous and such that aa and bb are mapped in opposite directions by ff, then ff has a fixed point in II. Suppose that f:CCf:\mathbb{C}\to\mathbb{C} is map and XX is a continuum. We extend the above for certain continuous maps of dendrites XD,XDX\to D, X\subset D and for positively oriented maps f:XC,XCf:X\to \mathbb{C}, X\subset \mathbb{C} with the continuum XX not necessarily invariant. Then we show that in certain cases a holomorphic map f:CCf:\mathbb{C}\to\mathbb{C} must have a fixed point aa in a continuum XX so that either aInt(X)a\in \mathrm{Int}(X) or ff exhibits rotation at aa.

Keywords

Cite

@article{arxiv.0805.1069,
  title  = {Fixed points in non-invariant plane continua},
  author = {Alexander Blokh and Lex Oversteegen},
  journal= {arXiv preprint arXiv:0805.1069},
  year   = {2016}
}

Comments

21 pages with corrected references

R2 v1 2026-06-21T10:38:24.703Z