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Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus, a figure in Greek mythology. [11] Tantalum is a very hard, ductile, lustrous, blue-gray transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as components of strong high-melting ...
In addition, 73 is the largest member in the covering set {,,,} of the smallest proven generalized Sierpiński number of the form + in nonary (, +), while it is also the largest member of the covering set {,,,} that belongs to the smallest such provable number in decimal (, +) — both in congruencies .
Number symbolism is an ancient and pervasive aspect of human thought, deeply intertwined with religion, philosophy, mysticism, and mathematics. Different cultures and traditions have assigned specific meanings to numbers, often linking them to divine principles, cosmic forces, or natural patterns.
The alchemical symbol for the sun and various sun gods. Also the alchemical symbol for gold which is the metal represented by the Sun which is the astral counterpart. Cross of Saint Peter (Petrine Cross) Peter requested to be crucified upside down, as he felt unworthy to die in the same manner as Christ. Used as a symbol of Saint Peter. A very ...
A computable number, also known as recursive number, is a real number such that there exists an algorithm which, given a positive number n as input, produces the first n digits of the computable number's decimal representation. Equivalent definitions can be given using μ-recursive functions, Turing machines or λ-calculus.
Sonnet 73, one of the most famous of William Shakespeare's 154 sonnets, focuses on the theme of old age. The sonnet addresses the Fair Youth . Each of the three quatrains contains a metaphor : Autumn, the passing of a day, and the dying out of a fire.
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73 (number) one of the years 73 BC, AD 73, 1973, 2073; 73, a United States-based amateur radio magazine; 73 Best regards, a popular Morse code abbreviation; No. 73, a British 1980s children's TV show; Nickname for the Boeing 737 airplane; 73 Bristol Temple Meads–Bradley Stoke North, a bus route in England; 73 Klytia, a main-belt asteroid