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In mathematics, Knuth's up-arrow notation is a method of notation for very large integers, introduced by Donald Knuth in 1976. [ 1 ] In his 1947 paper, [ 2 ] R. L. Goodstein introduced the specific sequence of operations that are now called hyperoperations .
The original 1963 version of the ASCII standard used the code point 0x5E for an up-arrow ↑. However, the 1965 ISO/IEC 646 standard defined code point 0x5E as one of five available for national variation, [ a ] with the circumflex ^ diacritic as the default and the up-arrow as one of the alternative uses. [ 5 ]
A manual for the PDP-6 describes Control+C as printing ↑ C, i.e., a small superscript upwards arrow before the C. [1] In the change from 1961 ASCII to 1968 ASCII, the up arrow became a caret. [ 2 ] Use in software
Additionally, the subsequent columns contains an informal explanation, a short example, the Unicode location, the name for use in HTML documents, [1] and the LaTeX symbol. Basic logic symbols [ edit ]
The caret (/ ˈ k ær ɪ t /) is a V-shaped grapheme, usually inverted and sometimes extended, used in proofreading and typography to indicate that additional material needs to be inserted at the point indicated in the text.
Upward arrows are often used to indicate an increase in a numerical value, and downward arrows indicate a decrease. In mathematical logic, a right-facing arrow indicates material conditional, and a left-right (bidirectional) arrow indicates if and only if, an upwards arrow indicates the NAND operator (negation of conjunction), an downwards arrow indicates the NOR operator (negation of ...
PGF/TikZ is a pair of languages for producing vector graphics (e.g., technical illustrations and drawings) from a geometric/algebraic description, with standard features including the drawing of points, lines, arrows, paths, circles, ellipses and polygons.
The editor includes full Unicode support, inline spell checking, auto-completion, code folding and rectangular block selection. Regular expressions are also supported for the find-and-replace actions. Texmaker includes wizards for the following tasks: Generate a new document or a letter or a tabular environment.