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  2. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

  3. Mathematical operators and symbols in Unicode - Wikipedia

    en.wikipedia.org/wiki/Mathematical_operators_and...

    The Unicode Standard encodes almost all standard characters used in mathematics. [1] Unicode Technical Report #25 provides comprehensive information about the character repertoire, their properties, and guidelines for implementation. [1]

  4. Octree - Wikipedia

    en.wikipedia.org/wiki/Octree

    The use of octrees for 3D computer graphics was pioneered by Donald Meagher at Rensselaer Polytechnic Institute, described in a 1980 report "Octree Encoding: A New Technique for the Representation, Manipulation and Display of Arbitrary 3-D Objects by Computer", [1] for which he holds a 1995 patent (with a 1984 priority date) "High-speed image generation of complex solid objects using octree ...

  5. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    used to indicate the word “by” When the letter X is preceded by a space, this means "by". For example, a chamfer may be called out as X [2] or ( ) number of places—for example, 8X or (8) When a dimension is used in multiple places either of these prefixes can be added to the dimension to define how many times this dimension is used.

  6. Syria - Wikipedia

    en.wikipedia.org/wiki/Syria

    Syria, [d] officially the Syrian Arab Republic, [e] [15] is a country in West Asia located in the Eastern Mediterranean and the Levant.It borders the Mediterranean Sea to the west, Turkey to the north, Iraq to the east and southeast, Jordan to the south, and Israel and Lebanon to the southwest.

  7. Original character - Wikipedia

    en.wikipedia.org/wiki/Original_character

    An original character (OC) typically refers to a type of fictional character that is created by a member of a fandom. They are a non- canonical character created by the author of fan fiction , a fan artist , or creator of another fan work, who exists within a certain fictional universe and may interact with existing characters or locations.