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theta functions; the angle of a scattered photon during a Compton scattering interaction; the angular displacement of a particle rotating about an axis; the Watterson estimator in population genetics; the thermal resistance between two bodies; ϑ ("script theta"), the cursive form of theta, often used in handwriting, represents
Upside-down marks, simple in the era of hand typesetting, were originally recommended by the Real Academia Española (Royal Spanish Academy), in the second edition of the Ortografía de la lengua castellana (Orthography of the Castilian language) in 1754 [3] recommending it as the symbol indicating the beginning of a question in written Spanish—e.g. "¿Cuántos años tienes?"
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 𐤈.
The voiceless dental non-sibilant fricative is a type of consonantal sound used in some spoken languages.It is familiar to most English speakers as the 'th' in think.Though rather rare as a phoneme among the world's languages, it is encountered in some of the most widespread and influential ones.
Latin theta (uppercase: ϴ, lowercase: θ) is an additional letter of the Latin script, based on the lowercase letter theta from the Greek alphabet. It is used in Cypriot Arabic , Gros Ventre , Comox , Fox , Thompson , Tuscarora , Halkomelem , Wakhi , Yavapai , Havasupai–Hualapai , and Romani . [ 1 ]
In mathematics, the theta operator is a differential operator defined by [1] [2] θ = z d d z . {\displaystyle \theta =z{d \over dz}.} This is sometimes also called the homogeneity operator , because its eigenfunctions are the monomials in z :
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Theta Nedra Berwick, or simply Theta, a fictional character and the protagonist of Marvel Comics' Predator by Ed Brission; Theta (finance), in quantitative finance, a first order derivative of an option pricing formula versus time; Theta role, in linguistics; Theta, Gauteng, a suburb of Johannesburg, South Africa