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Antecedents of the planetary symbols are attested in the attributes given to classical deities. The Roman planisphere of Bianchini (2nd century, currently in the Louvre, inv. Ma 540) [2] shows the seven planets represented by portraits of the seven corresponding gods, each a bust with a halo and an iconic object or dress, as follows: Mercury has a caduceus and a winged cap; Venus has a ...
The Greek alphabet on a black-figure pottery vessel, with an archaic chickenfoot-shaped psi. Psi / ˈ ( p) saɪ, ˈ ( p) siː / (P)SY, (P)SEE[ 1] (uppercase Ψ, lowercase ψ or 𝛙; Greek: ψι psi [ˈpsi]) is the twenty-third and penultimate letter of the Greek alphabet and is associated with a numeric value of 700.
Neptune's trident Pluto ⯓ U+2BD3 Pluto's orb and a bident ♇ U+2647 PL monogram for Pluto and Percival Lowell ⯔ U+2BD4 Symbol used mainly in France, Spain, Italy and Germany. [32] ⯕ U+2BD5 Symbol invented by German astrologer Hermann Lefeldt in 1946. Used by some followers of the Hamburg School of Astrology. [32] Also proposed for Pluto ...
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 retiarius stabs at a secutor with his trident in this mosaic from the villa at Nennig, c. 2nd–3rd century CE.. A retiarius (plural retiarii; literally, "net-man" in Latin) was a Roman gladiator who fought with equipment styled on that of a fisherman: a weighted net (rete (3rd decl.), hence the name), a three-pointed trident (fuscina or tridens), and a dagger ().
The use of astronomical symbols for the Sun and Moon dates to antiquity. The forms of the symbols that appear in the original papyrus texts of Greek horoscopes are a circle with one ray () for the Sun and a crescent for the Moon. [ 3] The modern Sun symbol, a circle with a dot (☉), first appeared in Europe in the Renaissance.
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.
A retiarius ("net fighter") with a trident and cast net, fighting a secutor (79 AD mosaic).. There were many different types of gladiators in ancient Rome.Some of the first gladiators had been prisoners-of-war, and so some of the earliest types of gladiators were experienced fighters; Gauls, Samnites, and Thraeces used their native weapons and armor.