Ciencias,UNAM

Browsing by Subject "dendrite"

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Browsing by Subject "dendrite"

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  • Cones that are 1/2-homogeneous
    Nadler, SB; Pellicer-Covarrubias, P (2007)
    A space is 1/2-homogeneous provided that there are exactly two orbits for the action of 2 the group of homeomorphisms of the space onto itself. Let X be a nonempty compact metric space such that the cone over X is ...
  • Dendrites and light open mappings
    Charatonik, JJ; Charatonik, LJ; Krupski, PL (2000)
    It is shown that a metric continuum X is a dendrite if and only if for every compact space Y and for every light open mapping f : Y --> f(Y) such that X subset of f(Y) there is a copy X' of X in Y for which the restriction ...
  • Openness of induced mappings
    Charatonik, JJ; Charatonik, WJ; Illanes, A (1999)
    Openness of induced mappings between hyperspaces of continua is studied. In particular we investigate continua X such that if for a mapping f:X --> Y the induced mapping C(f):C(X) --> C(Y) is open, then f is a homeomorphism. ...
  • Openness of induced projections
    Charatonik, JJ; Charatonik, WJ; Illanes, A (2000)
    For continua X and Y it is shown that if the projection f : X x Y --> X has its induced mapping C(f) open, then X is C-smooth. As a corollary, a characterization of dendrites in these terms is obtained.
  • Periodic-recurrent property for a class of lambda-dendroids
    Charatonik, JJ; Mendez-Lango, H (2005)
    A Space X has the periodic-recurrent property if for each self-mapping the closures of the sets of periodic points and of recurrent points are equal. The property is studied for some continua obtained as compactifications ...
  • Shore points and noncut points in dendroids
    Neumann-Lara, V; Puga, I (1999)
    A point p in a dendroid X is a shore point if there exists a sequence of subdendroids of X not containing p and converging to X with respect to the Hausdorff metric. The purpose of this paper is to present new results ...