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2. Graph paper - Wikipedia

   en.wikipedia.org/wiki/Graph_paper

   Isometric graph paper or 3D graph paper is a triangular graph paper which uses a series of three guidelines forming a 60° grid of small triangles. The triangles are arranged in groups of six to make hexagons.

3. Isometric projection - Wikipedia

   en.wikipedia.org/wiki/Isometric_projection

   Isometric graph paper can be placed under a normal piece of drawing paper to help achieve the effect without calculation. In a similar way, an isometric view can be obtained in a 3D scene. Starting with the camera aligned parallel to the floor and aligned to the coordinate axes, it is first rotated horizontally (around the vertical axis) by ± ...

4. Graph theory - Wikipedia

   en.wikipedia.org/wiki/Graph_theory

   The degree of a graph is the maximum of the ... 1736 is regarded as the first paper in the history of graph theory. [20] This paper, ... Many graph properties are ...

5. Handshaking lemma - Wikipedia

   en.wikipedia.org/wiki/Handshaking_lemma

   In this graph, an even number of vertices (the four vertices numbered 2, 4, 5, and 6) have odd degrees. The sum of degrees of all six vertices is 2 + 3 + 2 + 3 + 3 + 1 = 14, twice the number of edges.

6. Degree (graph theory) - Wikipedia

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

   The degree sequence of an undirected graph is the non-increasing sequence of its vertex degrees; [5] for the above graph it is (5, 3, 3, 2, 2, 1, 0). The degree sequence is a graph invariant , so isomorphic graphs have the same degree sequence.

7. Decade (log scale) - Wikipedia

   en.wikipedia.org/wiki/Decade_(log_scale)

   Typically the graph for such a representation would begin at 1 Hz (10 0) and go up to perhaps 100 kHz (10 5), to comfortably include the full audio band in a standard-sized graph paper, as shown below. Whereas in the same distance on a linear scale, with 10 as the major step-size, you might only get from 0 to 50.

8. Directed graph - Wikipedia

   en.wikipedia.org/wiki/Directed_graph

   The degree sequence of a directed graph is the list of its indegree and outdegree pairs; for the above example we have degree sequence ((2, 0), (2, 2), (0, 2), (1, 1)). The degree sequence is a directed graph invariant so isomorphic directed graphs have the same degree sequence.

9. Smith chart - Wikipedia

   en.wikipedia.org/wiki/Smith_chart

   The degrees scale represents the angle of the voltage reflection coefficient at that point. The Smith chart may also be used for lumped-element matching and analysis problems. Use of the Smith chart and the interpretation of the results obtained using it requires a good understanding of AC circuit theory and transmission-line theory, both of ...