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propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.
65 characters, including DEL. All belong to the common script. 1 Control-C has typically been used as a "break" or "interrupt" key. 2 Control-D has been used to signal "end of file" for text typed in at the terminal on Unix / Linux systems. Windows, DOS, and older minicomputers used Control-Z for this purpose.
For most symbols, the entry name is the corresponding Unicode symbol. So, for searching the entry of a symbol, it suffices to type or copy the Unicode symbol into the search textbox. Similarly, when possible, the entry name of a symbol is also an anchor, which allows linking easily from another Wikipedia article. When an entry name contains ...
These are the standard shortcuts: Control-Z (or ⌘ Command + Z) to undo. Control-X (or ⌘ Command + X) to cut. Control-C (or ⌘ Command + C) to copy. Control-V (or ⌘ Command + V) to paste. The IBM Common User Access (CUA) standard also uses combinations of the Insert, Del, Shift and Control keys. Early versions of Windows used the IBM ...
Ctrl/⌘ + F. Opens a search box to find a specific word, phrase, or figure on the page. Ctrl/⌘ + N. Create or launch a new document, file, or window, depending on the program. Ctrl/⌘ + S. Use ...
Mathematical operators and symbols are in multiple Unicode blocks. Some of these blocks are dedicated to, or primarily contain, mathematical characters while others are a mix of mathematical and non-mathematical characters. This article covers all Unicode characters with a derived property of "Math". [ 2][ 3]
The asterisk ( / ˈæstərɪsk / * ), from Late Latin asteriscus, from Ancient Greek ἀστερίσκος, asteriskos, "little star", [ 1][ 2] is a typographical symbol. It is so called because it resembles a conventional image of a heraldic star .
The nabla symbol. The nabla is a triangular symbol resembling an inverted Greek delta: [ 1] or ∇. The name comes, by reason of the symbol's shape, from the Hellenistic Greek word νάβλα for a Phoenician harp, [ 2][ 3] and was suggested by the encyclopedist William Robertson Smith in an 1870 letter to Peter Guthrie Tait. [ 2][ 4][ 5][ 6 ...