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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. ∀.
The division sign ( ÷) is a mathematical symbol consisting of a short horizontal line with a dot above and another dot below, used in Anglophone countries to indicate the operation of division. This usage, though widespread in some countries, is not universal and the symbol has a different meaning in other countries.
Without proper rendering support, you may see question marks, boxes, or other symbols. The triple bar or tribar, ≡, is a symbol with multiple, context-dependent meanings indicating equivalence of two different things. Its main uses are in mathematics and logic. It has the appearance of an equals sign = with a third line.
A dagger, obelisk, or obelus † is a typographical mark that usually indicates a footnote if an asterisk has already been used. [ 1] The symbol is also used to indicate death (of people) or extinction (of species or languages). [ 2] It is one of the modern descendants of the obelus, a mark used historically by scholars as a critical or ...
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...
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Equals sign. The equals sign ( British English) or equal sign ( American English ), also known as the equality sign, is the mathematical symbol =, which is used to indicate equality in some well-defined sense. [1] In an equation, it is placed between two expressions that have the same value, or for which one studies the conditions under which ...
The section sign ( §) is a typographical character for referencing individually numbered sections of a document; it is frequently used when citing sections of a legal code. [ 1] It is also known as the section symbol, section mark, double-s, or silcrow. [ 2][ 3] In other languages it may be called the "paragraph symbol" (for example, German ...