![]() The potential temperature in meteorology.One of the Chebyshev functions in prime number theory.A special function of several complex variables.The voiceless dental fricative, spelled θ.The lowercase letter θ is used as a symbol for: ( January 2011) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this section by adding citations to reliable sources. πρόϑεσις instead of πρόθεσις (means placing in public or laying out a corpse). U+03D1 ϑ GREEK THETA SYMBOL (script theta) is also common in biblical and theological usage e.g. Extensive lists of examples follow below at Mathematics and Science. For the purpose of writing Greek text, the two can be font variants of a single character, but θ and ϑ are also used as distinct symbols in technical and mathematical contexts. (There is also U+03F4 ϴ GREEK CAPITAL THETA SYMBOL). ![]() The cursive form ϑ was retained by Unicode as U+03D1 ϑ GREEK THETA SYMBOL, separate from U+03B8 θ GREEK SMALL LETTER THETA. ![]() In its archaic form, θ was written as a cross within a circle (as in the Etruscan or ), and later, as a line or point in circle ( or ). In Ancient Greek, θ represented the aspirated voiceless dental plosive IPA:, but in Modern Greek it represents the voiceless dental fricative IPA. Greek The alphabet on a black figure vessel, with a point-and-circle theta In the system of Greek numerals, it has a value of 9. Theta ( UK: / ˈ θ iː t ə/, US: / ˈ θ eɪ t ə/ uppercase: Θ or ϴ lowercase: θ or ϑ Ancient Greek: θῆτα thē̂ta Modern: θήτα thī́ta ) is the eighth letter of the Greek alphabet, derived from the Phoenician letter Teth. ![]()
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