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  2. String diagram - Wikipedia

    en.wikipedia.org/wiki/String_diagram

    While the diagrams in these first articles were hand-drawn, the advent of typesetting software such as LaTeX and PGF/TikZ made the publication of string diagrams more wide-spread. [ 5 ] The existential graphs and diagrammatic reasoning of Charles Sanders Peirce are arguably the oldest form of string diagrams, they are interpreted in the ...

  3. String graph - Wikipedia

    en.wikipedia.org/wiki/String_graph

    In graph theory, a string graph is an intersection graph of curves in the plane; each curve is called a "string".Given a graph G, G is a string graph if and only if there exists a set of curves, or strings, such that the graph having a vertex for each curve and an edge for each intersecting pair of curves is isomorphic to G.

  4. Hallade method - Wikipedia

    en.wikipedia.org/wiki/Hallade_method

    Sine, cosine, and versine of θ in terms of a unit circle, centered at O. The Hallade method, devised by Frenchman Emile Hallade, is a method used in track geometry for surveying, designing and setting out curves in railway track.

  5. Observer pattern - Wikipedia

    en.wikipedia.org/wiki/Observer_pattern

    The observer design pattern is a behavioural pattern listed among the 23 well-known "Gang of Four" design patterns that address recurring design challenges in order to design flexible and reusable object-oriented software, yielding objects that are easier to implement, change, test and reuse.

  6. Parse tree - Wikipedia

    en.wikipedia.org/wiki/Parse_tree

    Parse tree of the string "aab" with respect to the production rules . A parse tree or parsing tree [1] (also known as a derivation tree or concrete syntax tree) is an ordered, rooted tree that represents the syntactic structure of a string according to some context-free grammar.

  7. DOT (graph description language) - Wikipedia

    en.wikipedia.org/wiki/DOT_(graph_description...

    DOT is a graph description language, developed as a part of the Graphviz project. DOT graphs are typically stored as files with the .gv or .dot filename extension — .gv is preferred, to avoid confusion with the .dot extension used by versions of Microsoft Word before 2007.

  8. Structure chart - Wikipedia

    en.wikipedia.org/wiki/Structure_Chart

    Example of a Structured Chart. [1] A structure chart (SC) in software engineering and organizational theory is a chart which shows the smallest of a system to its lowest manageable levels. [2] They are used in structured programming to arrange program modules into a tree. Each module is represented by a box, which contains the module's name.

  9. File:Real projective line moduli space example.pdf - Wikipedia

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

    Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.