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  2. Dipole graph - Wikipedia

    en.wikipedia.org/wiki/Dipole_graph

    A dipole graph containing n edges is called the size-n dipole graph, and is denoted by D n. The size-n dipole graph is dual to the cycle graph C n. The honeycomb as an abstract graph is the maximal abelian covering graph of the dipole graph D 3, while the diamond crystal as an abstract graph is the maximal abelian covering graph of D 4.

  3. List of graph theory topics - Wikipedia

    en.wikipedia.org/wiki/List_of_graph_theory_topics

    Bivariegated graph; Cage (graph theory) Cayley graph; Circle graph; Clique graph; Cograph; Common graph; Complement of a graph; Complete graph; Cubic graph; Cycle graph; De Bruijn graph; Dense graph; Dipole graph; Directed acyclic graph; Directed graph; Distance regular graph; Distance-transitive graph; Edge-transitive graph; Interval graph ...

  4. Dipole antenna - Wikipedia

    en.wikipedia.org/wiki/Dipole_antenna

    The Hertzian dipole or elementary doublet refers to a theoretical construction, rather than a physical antenna design: It is an idealized tiny segment of conductor carrying a RF current with constant amplitude and direction along its entire (short) length; a real antenna can be modeled as the combination of many Hertzian dipoles laid end-to-end.

  5. Electric dipole moment - Wikipedia

    en.wikipedia.org/wiki/Electric_dipole_moment

    The electric dipole moment is a measure of the separation of positive and negative electrical charges within a system: that is, a measure of the system's overall polarity. The SI unit for electric dipole moment is the coulomb-metre (C⋅m). The debye (D) is another unit of measurement used in atomic physics and chemistry.

  6. SPQR tree - Wikipedia

    en.wikipedia.org/wiki/SPQR_tree

    In an S node, the associated graph is a cycle graph with three or more vertices and edges. This case is analogous to series composition in series–parallel graphs; the S stands for "series". [3] In a P node, the associated graph is a dipole graph, a multigraph with two vertices and three or more edges, the planar dual to a cycle graph

  7. Uniform matroid - Wikipedia

    en.wikipedia.org/wiki/Uniform_matroid

    The uniform matroid is the graphic matroid of an -edge dipole graph, and the dual uniform matroid is the graphic matroid of its dual graph, the -edge cycle graph. U n 0 {\displaystyle U{}_{n}^{0}} is the graphic matroid of a graph with n {\displaystyle n} self-loops, and U n n {\displaystyle U{}_{n}^{n}} is the graphic matroid of an n ...

  8. Multiple edges - Wikipedia

    en.wikipedia.org/wiki/Multiple_edges

    A planar graph remains planar if an edge is added between two vertices already joined by an edge; thus, adding multiple edges preserves planarity. [4] A dipole graph is a graph with two vertices, in which all edges are parallel to each other.

  9. Cosmic microwave background - Wikipedia

    en.wikipedia.org/wiki/Cosmic_microwave_background

    The amplitude of CMB dipole is around 3.3621 ± 0.0010 mK. [89] The CMB dipole moment is interpreted as the peculiar motion of the Earth relative to the CMB. Its amplitude depends on the time due to the Earth's orbit about the barycenter of the solar system. This enables us to add a time-dependent term to the dipole expression.