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Click the down-pointing arrow at the right of this box to display other groups; click on the appropriate group to select it. When the cursor is passed over a special-character link, the link is underlined; clicking on the underlined link enters that character at the current cursor position in the edit window. Figure 2.
The use of the caret for exponentiation can be traced back to ALGOL 60, [citation needed] which expressed the exponentiation operator as an upward-pointing arrow, intended to evoke the superscript notation common in mathematics. The upward-pointing arrow is now used to signify hyperoperations in Knuth's up-arrow notation.
A pointing stick (or trackpoint, also referred to generically as a nub or nipple) is a small analog stick used as a pointing device typically mounted centrally in a computer keyboard. Like other pointing devices such as mice , touchpads or trackballs , operating system software translates manipulation of the device into movements of the pointer ...
If the character set does not contain an up arrow, the caret (^) is used instead. The superscript notation a b {\displaystyle a^{b}} doesn't lend itself well to generalization, which explains why Knuth chose to work from the inline notation a ↑ b {\displaystyle a\uparrow b} instead.
[2] [3] The right-pointing triangle was adopted to indicate the direction of tape movement during playback. This design choice was straightforward: the arrow pointed in the direction the tape advanced. Over time, this symbol became standardized across various media devices, from cassette players to CD players, and eventually digital interfaces. [4]
↑, a notation of Knuth's up-arrow notation for very large integers; ↑, a mathematical game theory position Up; ↑ or Sheffer stroke, the logical connective "not both" or NAND; ↑, the APL function 'take' "Increased" (and similar meanings), in medical notation; ↑, a chemical symbol for production of gas, which bubbles up.
The Arrows block contains eight emoji: U+2194–U+2199 and U+21A9–U+21AA. [3] [4]The block has sixteen standardized variants defined to specify emoji-style (U+FE0F VS16) or text presentation (U+FE0E VS15) for the eight emoji, all of which default to a text presentation.
Miscellaneous Symbols and Arrows (Unicode block) includes more geometric shapes Miscellaneous Symbols and Pictographs (Unicode block) includes several geometric shapes of different colors Mathematical operators and symbols in Unicode