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Planar graphs

A planar graph can be drawn without edge crossings except at shared endpoints.

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  • Euler and Hamilton paths

    Euler paths traverse each edge once; Hamilton paths visit each vertex once.

  • Graph coloring

    Proper vertex coloring assigns different colors to adjacent vertices.

  • Graph Laplacian

    For a simple undirected graph, degree matrix minus adjacency matrix encodes connectivity and diffusion.

  • Graph connectivity

    Paths determine connected components; vertex and edge connectivity quantify robustness to removal.

  • Vertex degrees

    Degree counts incident edge ends; directed graphs distinguish incoming and outgoing degrees.

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Graph Theory

Explore graph structures; paths, coloring and planarity; networks and spectral viewpoints. Concepts and connections are available independently of video coverage.

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