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2. Letter (paper size) - Wikipedia

   en.wikipedia.org/wiki/Letter_(paper_size)

   In the US, paper density is usually measured in "pound per reams " (of 500 sheets). Typical Letter paper has a basis weight of paper of 20 or 24 pounds (9.1 or 10.9 kg) – the weight of 500 sheets (a ream) of 17-by-22-inch (431.8 by 558.8 mm) paper at 70 °F (21 °C) and at 50% humidity. [ 3] One ream of 20-pound Letter-sized paper weighs 5 ...

3. Graph paper - Wikipedia

   en.wikipedia.org/wiki/Graph_paper

   Graph paper, coordinate paper, grid paper, or squared paper is writing paper that is printed with fine lines making up a regular grid. The lines are often used as guides for plotting graphs of functions or experimental data and drawing curves. It is commonly found in mathematics and engineering education settings and in laboratory notebooks.

4. File:Graph paper inch Letter.pdf - Wikipedia

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

   Description Graph paper inch Letter.pdf. English: Gray, blue, red, green, black graph papers with 1 inch–0.5 inch–1/12 inch grids (page size: US Letter) in printable PDF format. Date. 25 July 2013, 18:02:35. Source.

5. Loose leaf - Wikipedia

   en.wikipedia.org/wiki/Loose_leaf

   Loose leaf. A loose leaf (also loose leaf paper, filler paper or refill paper) is a piece of paper of any kind that is not bound in place, or available on a continuous roll, and may be punched and organized as ring-bound (in a ring binder) or disc-bound. Loose leaf paper may be sold as free sheets, or made up into notepads, where perforations ...

6. Smith chart - Wikipedia

   en.wikipedia.org/wiki/Smith_chart

   Smith chart. The Smith chart (sometimes also called Smith diagram, Mizuhashi chart ( 水橋チャート ), Mizuhashi–Smith chart ( 水橋スミスチャート ), [1] [2] [3] Volpert–Smith chart ( Диаграмма Вольперта—Смита) [4] [5] or Mizuhashi–Volpert–Smith chart ), is a graphical calculator or nomogram designed ...

7. Vertex (graph theory) - Wikipedia

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

   A graph with 6 vertices and 7 edges where the vertex number 6 on the far-left is a leaf vertex or a pendant vertex. In discrete mathematics, and more specifically in graph theory, a vertex (plural vertices) or node is the fundamental unit of which graphs are formed: an undirected graph consists of a set of vertices and a set of edges (unordered pairs of vertices), while a directed graph ...

8. Erdős–Rényi model - Wikipedia

   en.wikipedia.org/wiki/Erdős–Rényi_model

   e. In the mathematical field of graph theory, the Erdős–Rényi model refers to one of two closely related models for generating random graphs or the evolution of a random network. These models are named after Hungarian mathematicians Paul Erdős and Alfréd Rényi, who introduced one of the models in 1959. [1] [2] Edgar Gilbert introduced ...

9. Grötzsch graph - Wikipedia

   en.wikipedia.org/wiki/Grötzsch_graph

   Grötzsch graph. In the mathematical field of graph theory, the Grötzsch graph is a triangle-free graph with 11 vertices, 20 edges, chromatic number 4, and crossing number 5. It is named after German mathematician Herbert Grötzsch, who used it as an example in connection with his 1959 theorem that planar triangle-free graphs are 3-colorable.