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- (a)
- Elementary examples: an arc, a circle, a noose, a figure eight,
a -curve
- (b)
- Acyclic graphs = trees.
- (c)
- planability of graphs; the Kuratowski graphs , ;
Whyburn's example of an open map from a planar onto a
nonplanar graph
- (d)
- Problem of Königsberg bridges; Euler's solution
Next: Dendrites
Up: LOCALLY CONNECTED CONTINUA
Previous: Basic examples: an arc,
Janusz J. Charatonik, Pawel Krupski and Pavel Pyrih
2001-11-30