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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. ∀.
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 ...
The total number of distinct Egyptian hieroglyphs increased over time from several hundred in the Middle Kingdom to several thousand during the Ptolemaic Kingdom.. In 1928/1929 Alan Gardiner published an overview of hieroglyphs, Gardiner's sign list, the basic modern standard.
One symbol, ♇, is a monogram of the letters PL (which can be interpreted to stand for Pluto or for astronomer Percival Lowell), was announced with the name of the new planet by the discoverers on May 1, 1930. [19] Another symbol, which was popularized in Paul Clancy's astrological publications, is based on Pluto's bident: [citation needed].
This article contains Unicode arrow characters. Without proper rendering support, you may see question marks, boxes, or other symbols instead of arrows. Arrows is a Unicode block containing line, curve, and semicircle symbols terminating in barbs or arrows .
See also. ≅, a symbol used in approximation. The eight trigrams of the Bagua: ☰, ☱, ☲, ☳, ☴, ☵, ☶, ☷. Ξ, capital letter Xi of the Greek alphabet. 三, Chinese numeral for the number 3. Glossary of mathematical symbols. Tesla Model 3, whose logo originally stylized the digit 3 as three horizontal bars. III (disambiguation ...
An arrow is a graphical symbol, such as ← or →, or a pictogram, used to point or indicate direction. In its simplest form, an arrow is a triangle, chevron, or concave kite, usually affixed to a line segment or rectangle, [ 1] and in more complex forms a representation of an actual arrow (e.g. U+27B5). The direction indicated by an arrow is ...
Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...