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Published in:
2016 | OriginalPaper | Chapter
Directed and Undirected Graphs
Authors : Guerino Mazzola, Maria Mannone, Yan Pang
Published in: Cool Math for Hot Music
Publisher: Springer International Publishing
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Up to now, we have been able to construct all basic number domains ℕ, ℤ, ℚ, ℝ, ℂ. But we have not considered geometric objects. This chapter begins to fill that gap. It introduces the most elementary geometric objects: graphs—systems of points and arrows connected by directed or undirected lines. We shall conclude part IV with the introduction of higher-dimension graphical objects that relate to coverings of sets by a system of subsets.