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  2. Graph theory - Wikipedia

    en.wikipedia.org/wiki/Graph_theory

    I give a rule for the geometrical multiplication of graphs, i.e. for constructing a graph to the product of in- or co-variants whose separate graphs are given. […]" (italics as in the original). The first textbook on graph theory was written by Dénes KÅ‘nig, and published in 1936. [26]

  3. Rooted product of graphs - Wikipedia

    en.wikipedia.org/wiki/Rooted_product_of_graphs

    The rooted product of graphs. In mathematical graph theory, the rooted product of a graph G and a rooted graph H is defined as follows: take | V(G) | copies of H, and for every vertex v i of G, identify v i with the root node of the i-th copy of H. More formally, assuming that

  4. Rooted graph - Wikipedia

    en.wikipedia.org/wiki/Rooted_graph

    In mathematics, and, in particular, in graph theory, a rooted graph is a graph in which one vertex has been distinguished as the root. [1] [2] Both directed and undirected versions of rooted graphs have been studied, and there are also variant definitions that allow multiple roots. Examples of rooted graphs with some variants.

  5. Fundamentals of Physics - Wikipedia

    en.wikipedia.org/wiki/Fundamentals_of_Physics

    The current version is a revised version of the original 1960 textbook Physics for Students of Science and Engineering by Halliday and Resnick, which was published in two parts (Part I containing Chapters 1-25 and covering mechanics and thermodynamics; Part II containing Chapters 26-48 and covering electromagnetism, optics, and introducing ...

  6. Tree (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Tree_(graph_theory)

    A path graph (or linear graph) consists of n vertices arranged in a line, so that vertices i and i + 1 are connected by an edge for i = 1, …, n – 1. A starlike tree consists of a central vertex called root and several path graphs attached to it. More formally, a tree is starlike if it has exactly one vertex of degree greater than 2.

  7. Gabriel's theorem - Wikipedia

    en.wikipedia.org/wiki/Gabriel's_theorem

    A quiver is of finite type if and only if its underlying graph (when the directions of the arrows are ignored) is one of the ADE Dynkin diagrams: , , , , . The indecomposable representations are in a one-to-one correspondence with the positive roots of the root system of the Dynkin diagram.

  8. Physical Science Study Committee - Wikipedia

    en.wikipedia.org/wiki/Physical_Science_Study...

    Doubleday published a "Science Studies Series" of over 50 small paperback books on related scientific subjects at a high school level, covering topics such as crystal growing, waves and beaches, subatomic particles, the universe, and biographies of notable scientists.

  9. Book (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Book_(graph_theory)

    [1] [2] The 7-page book graph of this type provides an example of a graph with no harmonious labeling. [2] A second type, which might be called a triangular book, is the complete tripartite graph K 1,1,p. It is a graph consisting of triangles sharing a common edge. [3] A book of this type is a split graph.

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