Abstract

The first part of this chapter collects rather elementary and well known material: We start with definitions of geometric and topological graphs, rush through basic notions from graph theory and report on facts about planar graphs. Beginning with Section 1.4 we discuss problems from the extremal theory for geometric graphs. That is, we deal with questions of Turán type: How many edges can a geometric graph avoiding a specified configuration of edges have?KeywordsPlanar GraphTopological GraphGeometric GraphParallel EdgeOuterplanar GraphThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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