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Qu'est-ce (qui) est σ" αυτή την κρίση - définition
Σ Cancri
Sigma
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EIGHTEENTH LETTER OF THE GREEK ALPHABET
Σ; ∑; Ϲ; Lunate sigma; Ͻ; Ͽ; Antisigma periestigmenon; Ͼ; Sigma periestigmenon; SIGMA; Capital sigma; Sigma (letter); \sigma; Σίγμα; Sigma (Greek); Final sigma; Medial sigma; Sigma (Greek letter); ΣΊΓΜΑ
·noun The Greek letter /, /, or / (English S, or s). It originally had the form of the English C.
SIGMA
EIGHTEENTH LETTER OF THE GREEK ALPHABET
Σ; ∑; Ϲ; Lunate sigma; Ͻ; Ͽ; Antisigma periestigmenon; Ͼ; Sigma periestigmenon; SIGMA; Capital sigma; Sigma (letter); \sigma; Σίγμα; Sigma (Greek); Final sigma; Medial sigma; Sigma (Greek letter); ΣΊΓΜΑ
Software Industrialized Generator and Maintenance Aids system (Reference: MITI)
sigma
EIGHTEENTH LETTER OF THE GREEK ALPHABET
Σ; ∑; Ϲ; Lunate sigma; Ͻ; Ͽ; Antisigma periestigmenon; Ͼ; Sigma periestigmenon; SIGMA; Capital sigma; Sigma (letter); \sigma; Σίγμα; Sigma (Greek); Final sigma; Medial sigma; Sigma (Greek letter); ΣΊΓΜΑ
['s?gm?]
¦ noun
1. the eighteenth letter of the Greek alphabet (?, ?, or at the end of a word ?), transliterated as 's'.
2. [as modifier] Chemistry & Physics (of an electron or orbital) with zero angular momentum about an internuclear axis.
¦ symbol
1. (?) mathematical sum.
2. (?) standard deviation.
Origin
from Gk.
Wikipédia
Sigma Cancri
The Bayer designation Sigma Cancri (σ Cnc / σ Cancri) is shared by three star systems, in the constellation Cancer:
- σ1 Cancri, which has the Flamsteed designation 51 Cancri
- σ2 Cancri, which has the Flamsteed designation 59 Cancri
- σ3 Cancri, which has the Flamsteed designation 64 Cancri
The above correspondence between Flamsteed and Bayer designations is the modern one, which is based on the Atlas Coelestis Novus, published by Eduard Heis in 1872. An alternate correspondence sometimes encountered, for instance in the 1835 astronomical catalogue of Thomas Brisbane, is:
- σ1 Cancri = 46 Cancri
- σ2 Cancri = 57 Cancri
- σ3 Cancri = 61 Cancri
Johann Bayer's Uranometria places the sigma between these two groups of stars, making proper association uncertain.
