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Τι (ποιος) είναι 6-j symbol - ορισμός
6-j symbol
![[[Jucys diagram]] for the Wigner 6-j symbol. The plus sign on the nodes indicate an anticlockwise reading of its surrounding lines. Due to its symmetries, there are many ways in which the diagram can be drawn. An equivalent configuration can be created by taking its mirror image and thus changing the pluses to minuses.](https://commons.wikimedia.org/wiki/Special:FilePath/Jucys diagram for Wigner 6-j symbol.svg?width=200 "[[Jucys diagram]] for the Wigner 6-j symbol. The plus sign on the nodes indicate an anticlockwise reading of its surrounding lines. Due to its symmetries, there are many ways in which the diagram can be drawn. An equivalent configuration can be created by taking its mirror image and thus changing the pluses to minuses.")
SUM OF MULTIPLES OF FOUR 3J SYMBOLS
Six-j Symbol; Six-j symbol; 6j symbol; Racah coefficient; Racah coefficients; Wigner 6j-symbol; 6j-symbol
Wigner's 6-j symbols were introduced by Eugene Paul Wigner in 1940 and published in 1965. They are defined as a sum over products of four Wigner 3-j symbols,
3-j symbol
COEFFICIENTS COUPLED WITH ANGULAR MOMENTUM
3j symbol; Wigner 3-j symbol; 3j-symbol; 3jm-symbol; 3-jm symbols; Three-j symbol; Wigner 3j-symbol; 3-jm symbol; Wigner 3-j symbols
In quantum mechanics, the Wigner 3-j symbols, also called 3-jm symbols, are an alternative to Clebsch–Gordan coefficients for the purpose of adding angular momenta. While the two approaches address exactly the same physical problem, the 3-j symbols do so more symmetrically.
Symbol (typeface)
TYPEFACE FOR GREEK AND MATHEMATICAL SYMBOLS
Symbol font; Symbol (font); Symbol.ttf; MS Symbol; Radicalex; Radical extender; Ventura Symbol; Mac OS Symbol; Code page 1038; X-mac-symbol
Symbol is one of the four standard fonts available on all PostScript-based printers, starting with Apple's original LaserWriter (1985). It contains a complete unaccented Greek alphabet (upper and lower case) and a selection of commonly used mathematical symbols.
