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  2. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.

  3. Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/Greek_alphabet

    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.

  4. Phi - Wikipedia

    en.wikipedia.org/wiki/Phi

    Archaic form of Phi. Phi (/ f aɪ /; [1] uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖ pheî; Modern Greek: φι fi) is the twenty-first letter of the Greek alphabet.. In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ([pʰ]), which was the origin of its usual romanization as ph .

  5. Theta - Wikipedia

    en.wikipedia.org/wiki/Theta

    Greek theta variant in cursive form. The cursive form ϑ was retained by Unicode as U+03D1 ϑ GREEK THETA SYMBOL, separate from U+03B8 θ GREEK SMALL LETTER THETA. (There is also U+03F4 ϴ GREEK CAPITAL THETA SYMBOL.) 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 ...

  6. Gamma - Wikipedia

    en.wikipedia.org/wiki/Gamma

    The Ancient Greek /g/ phoneme was the voiced velar stop, continuing the reconstructed proto-Indo-European *g, *ǵ. The modern Greek phoneme represented by gamma is realized either as a voiced palatal fricative ( /ʝ/ ) before a front vowel (/e/, /i/), or as a voiced velar fricative /ɣ/ in all other environments.

  7. Delta (letter) - Wikipedia

    en.wikipedia.org/wiki/Delta_(letter)

    Delta (/ ˈ d ɛ l t ə /; [1] uppercase Δ, lowercase δ; Greek: δέλτα, délta, ) [2] is the fourth letter of the Greek alphabet. In the system of Greek numerals , it has a value of four. It was derived from the Phoenician letter dalet 𐤃. [ 3 ]

  8. Psi (Greek) - Wikipedia

    en.wikipedia.org/wiki/Psi_(Greek)

    The Greek alphabet on a black-figure pottery vessel, with an archaic chickenfoot-shaped psi.. Psi / ˈ (p) s aɪ, ˈ (p) s iː / (P)SY, (P)SEE [1] (uppercase Ψ, lowercase ψ or 𝛙; Greek: ψι psi) is the twenty-third and penultimate letter of the Greek alphabet and is associated with a numeric value of 700.

  9. Omega - Wikipedia

    en.wikipedia.org/wiki/Omega

    Omega (US: / oʊ ˈ m eɪ ɡ ə,-ˈ m ɛ ɡ ə,-ˈ m iː ɡ ə /, UK: / ˈ oʊ m ɪ ɡ ə /; [1] uppercase Ω, lowercase ω; Ancient Greek ὦ, later ὦ μέγα, Modern Greek ωμέγα) is the twenty-fourth and last letter in the Greek alphabet.