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Xi (/ z aɪ / ZY or /(k) s aɪ / (K)SY; [1] [2] uppercase Ξ, lowercase ξ; Greek: ξι) is the fourteenth letter of the Greek alphabet, representing the voiceless consonant cluster. Its name is pronounced [ksi] in Modern Greek .
the Christoffel symbols that describe components of a metric connection; the stack alphabet in the formal definition of a pushdown automaton, or the tape-alphabet in the formal definition of a Turing machine; the Feferman–Schütte ordinal Γ 0; represents: the specific weight of substances; the lower incomplete gamma function
The symbol ϵ (U+03F5) is designated specifically for the lunate form, used as a technical symbol. The symbol ϑ ("script theta") is a cursive form of theta (θ), frequent in handwriting, and used with a specialized meaning as a technical symbol. The symbol ϰ ("kappa symbol") is a cursive form of kappa (κ), used as a technical symbol.
Phonemic notation commonly uses IPA symbols that are rather close to the default pronunciation of a phoneme, but for legibility often uses simple and 'familiar' letters rather than precise notation, for example /r/ and /o/ for the English [ɹʷ] and [əʊ̯] sounds, or /c, ɟ/ for [t͜ʃ, d͜ʒ] as mentioned above.
This chart provides audio examples for phonetic vowel symbols. The symbols shown include those in the International Phonetic Alphabet (IPA) and added material. The chart is based on the official IPA vowel chart. [1]
In ancient times, some local forms of the Greek alphabet used the chi instead of xi to represent the /ks/ sound. This was borrowed into the early Latin language, which led to the use of the letter X for the same sound in Latin, and many modern languages that use the Latin alphabet .
Xi (business), a Chinese form of business organization; Xi baryon, a range of baryons with one up or down quark and two heavier quarks; Xi, a brand name for the 4G LTE mobile telecommunications service operated by NTT DoCoMo in Japan; Xi (apartment), a brand name for some apartments constructed by GS Construction in Korea.
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...