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  2. Completing the square - Wikipedia

    en.wikipedia.org/wiki/Completing_the_square

    Therefore, the graph of the function f(x − h) = (x − h) 2 is a parabola shifted to the right by h whose vertex is at (h, 0), as shown in the top figure. In contrast, the graph of the function f(x) + k = x 2 + k is a parabola shifted upward by k whose vertex is at (0, k), as shown in the center figure.

  3. File:Dih 4 Cayley Graph; generators a, b; prefix.svg - Wikipedia

    en.wikipedia.org/wiki/File:Cayley_Graph_of...

    The same file with right action (which is more usual for Cayley graphs). One of the Cayley graphs of the dihedral group Dih 4. This version of File:Dih 4 Cayley Graph; generators a, b.svg uses prefix notation, which is unusual for Cayley graphs. In this file an arrow for s goes from g to sg, while in the other file it goes from g to gs.

  4. Graph power - Wikipedia

    en.wikipedia.org/wiki/Graph_power

    Both the chromatic number and the degeneracy of the k th power of a planar graph of maximum degree Δ are O(Δ ⌊k/2⌋), where the degeneracy bound shows that a greedy coloring algorithm may be used to color the graph with this many colors. [4] For the special case of a square of a planar graph, Wegner conjectured in 1977 that the chromatic ...

  5. Squaregraph - Wikipedia

    en.wikipedia.org/wiki/Squaregraph

    The characterization of squaregraphs in terms of distance from a root and links of vertices can be used together with breadth first search as part of a linear time algorithm for testing whether a given graph is a squaregraph, without any need to use the more complex linear-time algorithms for planarity testing of arbitrary graphs.

  6. Quartic graph - Wikipedia

    en.wikipedia.org/wiki/Quartic_graph

    The Meredith graph, a quartic graph with 70 vertices that is 4-connected but has no Hamiltonian cycle, disproving a conjecture of Crispin Nash-Williams. [4] Every medial graph is a quartic plane graph, and every quartic plane graph is the medial graph of a pair of dual plane graphs or multigraphs. [5]

  7. Regular graph - Wikipedia

    en.wikipedia.org/wiki/Regular_graph

    In graph theory, a regular graph is a graph where each vertex has the same number of neighbors; i.e. every vertex has the same degree or valency. A regular directed graph must also satisfy the stronger condition that the indegree and outdegree of each internal vertex are equal to each other. [1]

  8. Graph (discrete mathematics) - Wikipedia

    en.wikipedia.org/wiki/Graph_(discrete_mathematics)

    A graph with three vertices and three edges. A graph (sometimes called an undirected graph to distinguish it from a directed graph, or a simple graph to distinguish it from a multigraph) [4] [5] is a pair G = (V, E), where V is a set whose elements are called vertices (singular: vertex), and E is a set of unordered pairs {,} of vertices, whose elements are called edges (sometimes links or lines).

  9. Three-dimensional graph - Wikipedia

    en.wikipedia.org/wiki/Three-dimensional_graph

    The graph of a function of two variables, embedded into a three-dimensional space Topics referred to by the same term This disambiguation page lists mathematics articles associated with the same title.

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