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Tau (/ ˈ t aʊ, ˈ t ɔː, ˈ t ɒ /; [1] uppercase Τ, lowercase τ or ; Greek: ταυ) is the nineteenth letter of the Greek alphabet, representing the voiceless dental or alveolar plosive IPA:. In the system of Greek numerals , it has a value of 300.
The uppercase and lowercase forms of the 24 letters are: Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ /ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω. The Greek alphabet is the ancestor of several scripts, such as the Latin, Gothic, Coptic, and Cyrillic scripts. [8]
Kendall tau rank correlation coefficient, a measure of rank correlation in statistics; Ramanujan's tau function in number theory; shear stress in continuum mechanics; a type variable in type theories, such as the simply typed lambda calculus; path tortuosity in reservoir engineering; in topology, a given topology
Tau with caron: Nonstandard letter for Cypriot Greek representing /c/ [9] Ύύ: Upsilon with acute: High pitch on short vowel or rising pitch on long vowel Ὺὺ: Upsilon with grave: Archaic letter indicating normal or low pitch ῦ: Upsilon with circumflex: Archaic letter indicating high or falling pitch ὐ: Upsilon with smooth breathing
In modern typefaces, lowercase stigma is similar in appearance to final sigma (ς), but the top loop tends to be larger, and extends farther to the right. It can normally be distinguished from final sigma in the context, because the combination στ never occurs at the end of a word, and conversely the final sigma form ς never occurs inside a ...
Theta (UK: / ˈ θ iː t ə /, US: / ˈ θ eɪ t ə /) uppercase Θ or ϴ; lowercase θ [note 1] or ϑ; Ancient Greek: θῆτα thē̂ta [tʰɛ̂ːta]; Modern: θήτα thī́ta) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth.
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Mu (/ ˈ m (j) uː /; [1] [2] uppercase Μ, lowercase μ; Ancient Greek μῦ, Greek: μι or μυ—both ) is the twelfth letter of the Greek alphabet, representing the voiced bilabial nasal IPA:. In the system of Greek numerals it has a value of 40. [ 3 ]