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2. Neighbourhood (graph theory) - Wikipedia

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

   Neighbourhood (graph theory) In this graph, the vertices adjacent to 5 are 1, 2 and 4. The neighbourhood of 5 is the graph consisting of the vertices 1, 2, 4 and the edge connecting 1 and 2. For other meanings of neighbourhoods in mathematics, see Neighbourhood (mathematics). In graph theory, an adjacent vertex of a vertex v in a graph is a ...

3. Graph algebra - Wikipedia

   en.wikipedia.org/wiki/Graph_algebra

   Graph algebra. In mathematics, especially in the fields of universal algebra and graph theory, a graph algebra is a way of giving a directed graph an algebraic structure. It was introduced by McNulty and Shallon, [1] and has seen many uses in the field of universal algebra since then.

4. List of graphs by edges and vertices - Wikipedia

   en.wikipedia.org/wiki/List_of_graphs_by_edges...

   Contents. List of graphs by edges and vertices. This sortable list points to the articles describing various individual (finite) graphs. [1] The columns 'vertices', 'edges', ' radius ', ' diameter ', ' girth ', 'P' (whether the graph is planar ), χ ( chromatic number) and χ' ( chromatic index) are also sortable, allowing to search for a ...

5. Graph (discrete mathematics) - Wikipedia

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

   A cycle graph or circular graph of order n ≥ 3 is a graph in which the vertices can be listed in an order v 1, v 2, …, v n such that the edges are the {v i, v i+1} where i = 1, 2, …, n − 1, plus the edge {v n, v 1}. Cycle graphs can be characterized as connected graphs in which the degree of all vertices is 2.

6. Comparison of e-readers - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_e-readers

   Comparison of screen to paper size: A5 paper, 10.1-inch (257 mm) screen and A4 paper. All electronic paper types offer lower power consumption and better sunlight contrast than LCDs. Some offer a backlight to allow low-light reading. With the backlight turned off, all have a similar appearance to "ink on paper" and are readable in bright ...

7. Exponential function - Wikipedia

   en.wikipedia.org/wiki/Exponential_function

   Exponential functions with bases 2 and 1/2. The exponential function is a mathematical function denoted by () = ⁡ or (where the argument x is written as an exponent).Unless otherwise specified, the term generally refers to the positive-valued function of a real variable, although it can be extended to the complex numbers or generalized to other mathematical objects like matrices or Lie algebras.