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Whitespace character. A whitespace character is a character data element that represents white space when text is rendered for display by a computer . For example, a space character ( U+0020 SPACE, ASCII 32) represents blank space such as a word divider in a Western script . A printable character results in output when rendered, but a ...
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. ∀.
Use in mathematics. In mathematics, the null sign (∅) denotes the empty set. Note that a null set is not necessarily an empty set. Common notations for the empty set include " {}", "∅", and " ". The latter two symbols were introduced by the Bourbaki group (specifically André Weil) in 1939, inspired by the letter Ø in the Danish and ...
Tombstone (typography), the end of proof character. Geometric Shapes Extended (Unicode block) 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.
Miscellaneous Symbols is a Unicode block (U+2600–U+26FF) containing glyphs representing concepts from a variety of categories: astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.
Null symbol. Look up null or ␀ in Wiktionary, the free dictionary. Null symbol may refer to: Null character, U+0000 <control-0000>, U+2400 ␀ SYMBOL FOR NULL (a single-character glyph "NUL") Null sign (∅), the empty set. Null (SQL) (ω), a special marker and keyword NULL in SQL. Empty string (λ, Λ, or ε), in formal language theory.
In word processing and digital typesetting, a non-breaking space ( ), also called NBSP, required space, [1] hard space, or fixed space (in most typefaces, it is not of fixed width ), is a space character that prevents an automatic line break at its position. In some formats, including HTML, it also prevents consecutive whitespace characters ...
In all modern character sets, the null character has a code point value of zero. In most encodings, this is translated to a single code unit with a zero value. For instance, in UTF-8 it is a single zero byte. However, in Modified UTF-8 the null character is encoded as two bytes: 0xC0,0x80. This allows the byte with the value of zero, which is ...