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In logic, a set of symbols is commonly used to express logical representation. The following table lists many common symbols, together with their name, how they should be read out loud, and the related field of mathematics.
Ctrl+⇧ Shift+⌘ Cmd+3: Ctrl+Print Screen: Ctrl+Show Windows: Copy screenshot of active window to clipboard Alt+Print Screen: Ctrl+Alt+Print Screen: Save screenshot of window as file ⇧ Shift+⌘ Cmd+4 then Space then move mouse and click: Alt+Print Screen : Ctrl+Alt+Show Windows then move mouse and click Copy screenshot of window to clipboard
The earliest editors (designed for teleprinter terminals) provided keyboard commands to delineate a contiguous region of text, then delete or move it. Since moving a region of text requires first removing it from its initial location and then inserting it into its new location, various schemes had to be invented to allow for this multi-step process to be specified by the user.
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]
The graphically identical sign ∴ serves as a Japanese map symbol on the maps of the Geographical Survey Institute of Japan, indicating a tea plantation. On some maps, a version of the sign with thicker dots, ⛬ , is used to signal the presence of a national monument , historic site or ruins ; it has its own Unicode code point.
The triple bar character in Unicode is code point U+2261 ≡ IDENTICAL TO (≡, ≡). [1] The closely related code point U+2262 ≢ NOT IDENTICAL TO (≢, ≢) is the same symbol with a slash through it, indicating the negation of its mathematical meaning.
To insert a dash or minus sign, use the toolbar below the edit box. Click where you want the character to be inserted, select "Insert" from the pull-down menu, and then: To insert an en dash (–), click on the first character (the shorter dash). To insert an em dash (—), click on the second character (the longer dash).
A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]