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  2. List of Greek letters - Wikipedia

    en.wikipedia.org/wiki/List_of_Greek_letters

    Eta 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. Ἢἢ. Eta with grave and smooth breathing. Archaic letter denoting the absence of /h/ prior to the vowel, with a normal or low pitch. Ἦἦ.

  3. Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/Greek_alphabet

    This writing system, unrelated to the Greek alphabet, last appeared in the thirteenth century BC. In the late ninth century BC or early eighth century BC, the Greek alphabet emerged. [2] The period between the use of the two writing systems, during which no Greek texts are attested, is known as the Greek Dark Ages.

  4. English alphabet - Wikipedia

    en.wikipedia.org/wiki/English_alphabet

    For the distinction between [ ], / / and , see IPA § Brackets and transcription delimiters. Modern English is written with a Latin-script alphabet consisting of 26 letters, with each having both uppercase and lowercase forms. The word alphabet is a compound of alpha and beta, the names of the first two letters in the Greek alphabet.

  5. ∂ - Wikipedia

    en.wikipedia.org/wiki/%E2%88%82

    The character ∂ (Unicode: U+2202) is a stylized cursive d mainly used as a mathematical symbol, usually to denote a partial derivative such as (read as "the partial derivative of z with respect to x "). [1][2] It is also used for boundary of a set, the boundary operator in a chain complex, and the conjugate of the Dolbeault operator on smooth ...

  6. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    Letter frequency is the number of times letters of the alphabet appear on average in written language. Letter frequency analysis dates back to the Arab mathematician Al-Kindi (c. 801 –873 AD), who formally developed the method to break ciphers. Letter frequency analysis gained importance in Europe with the development of movable type in 1450 ...

  7. Danish and Norwegian alphabet - Wikipedia

    en.wikipedia.org/wiki/Danish_and_Norwegian_alphabet

    Danish and Norwegian alphabet. The Danish and Norwegian alphabet is the set of symbols, forming a variant of the Latin alphabet, used for writing the Danish and Norwegian languages. It has consisted of the following 29 letters since 1917 (Norwegian) and 1948 (Danish): The letters c , q , w , x and z are not used in the spelling of indigenous words.

  8. Alphabetical order - Wikipedia

    en.wikipedia.org/wiki/Alphabetical_order

    Both letters were also used by Anglo-Saxon scribes who also used the Runic letter Wynn to represent /w/. Þ (called thorn; lowercase þ) is also a Runic letter. Ð (called eth; lowercase ð) is the letter D with an added stroke. Kiowa is ordered on phonetic principles, like the Brahmic scripts, rather than on the historical Latin order.

  9. Zeta - Wikipedia

    en.wikipedia.org/wiki/Zeta

    Zeta (UK: / ˈ z iː t ə /, US: / ˈ z eɪ t ə /; [1] uppercase Ζ, lowercase ζ; Ancient Greek: ζῆτα, Demotic Greek: ζήτα, classical [d͡zɛ̌ːta] or zē̂ta; Greek pronunciation: zíta) is the sixth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 7. It was derived from the Phoenician letter zayin.