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  2. Upsilon - Wikipedia

    en.wikipedia.org/wiki/Upsilon

    The Roman Emperor Claudius proposed introducing a new letter into the Latin alphabet to transcribe the so-called sonus medius (a short vowel before labial consonants), but in inscriptions, the new letter was sometimes used for Greek upsilon instead. Four letters of the Latin alphabet arose from it: and U, Y and, much later, V and W.

  3. Ʊ - Wikipedia

    en.wikipedia.org/wiki/Ʊ

    Shapes of horseshoe as designed for the African reference alphabet, clearly based on a serifed shape of the Latin capital U.. The letter Ʊ (minuscule: ʊ), called horseshoe or sometimes bucket, inverted omega or Latin upsilon, is a letter of the International Phonetic Alphabet used to transcribe a near-close near-back rounded vowel.

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

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

    The Bayer designation naming scheme for stars typically uses the first Greek letter, α, for the brightest star in each constellation, and runs through the alphabet before switching to Latin letters. In mathematical finance , the Greeks are the variables denoted by Greek letters used to describe the risk of certain investments.

  5. List of Greek letters - Wikipedia

    en.wikipedia.org/wiki/List_of_Greek_letters

    Upsilon with acute and smooth breathing: Archaic letter denoting the absence of /h/ prior to the vowel, with a high pitch on a short vowel or rising pitch on a long vowel ὒ: Upsilon with grave and smooth breathing: Archaic letter denoting the absence of /h/ prior to the vowel, with a normal or low pitch ὖ: Upsilon with circumflex and smooth ...

  6. 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.

  7. Latin alphabet - Wikipedia

    en.wikipedia.org/wiki/Latin_alphabet

    The term Latin alphabet may refer to either the alphabet used to write Latin (as described in this article) or other alphabets based on the Latin script, which is the basic set of letters common to the various alphabets descended from the classical Latin alphabet, such as the English alphabet.

  8. Archaic Greek alphabets - Wikipedia

    en.wikipedia.org/wiki/Archaic_Greek_alphabets

    All forms of the Greek alphabet were originally based on the shared inventory of the 22 symbols of the Phoenician alphabet, with the exception of the letter Samekh, whose Greek counterpart Xi (Ξ) was used only in a subgroup of Greek alphabets, and with the common addition of Upsilon (Υ) for the vowel /u, ū/.

  9. Latin letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Latin_letters_used_in...

    Many letters of the Latin alphabet, both capital and small, are used in mathematics, science, and engineering to denote by convention specific or abstracted constants, variables of a certain type, units, multipliers, or physical entities. Certain letters, when combined with special formatting, take on special meaning.