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  2. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    The letter Sigma. Sigma (/ ˈ s ɪ ɡ m ə / SIG-mə; [1] uppercase Σ, lowercase σ, lowercase in word-final position ς; Ancient Greek: σίγμα) is the eighteenth letter of the Greek alphabet.

  3. History of mathematical notation - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematical...

    Numerical symbols consisted probably of strokes or notches cut in wood or stone, which were intelligible across cultures. For example, one notch in a bone represented one animal, person, or object. Numerical notation's distinctive feature—symbols having both local and intrinsic values—implies a state of civilization at the period of its ...

  4. 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.

  5. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-000158935.html

    "Sigma” is a slang word for “the best” or someone who is a humble alpha male. ... The teen version of “mewing” is a “hush” symbol and touching the jawline to mean, “I can’t talk

  6. Stigma (ligature) - Wikipedia

    en.wikipedia.org/wiki/Stigma_(ligature)

    Stigma was co-opted as a name specifically for the στ sign, evidently because of the acrophonic value of its initial st-as well as the analogy with the name of sigma. The numeral symbol, originally quite unrelated to the στ ligature, developed from the letter Ϝ, which stood for the sound /w/ in early pre-classical forms of the Greek ...

  7. History of the Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Greek_alphabet

    The history of the Greek alphabet starts with the adoption of Phoenician letter forms in the 9th–8th centuries BC during early Archaic Greece and continues to the present day. The Greek alphabet was developed during the Iron Age , centuries after the loss of Linear B , the syllabic script that was used for writing Mycenaean Greek until the ...

  8. Chi Rho - Wikipedia

    en.wikipedia.org/wiki/Chi_Rho

    Early symbols similar to the Chi Rho were the Staurogram and the IX monogram (). In pre-Christian times, the Chi-Rho symbol was also used to mark a particularly valuable or relevant passage in the margin of a page, abbreviating chrēston (good). [3] Some coins of Ptolemy III Euergetes (r. 246–222 BC) were marked with a Chi-Rho. [4]

  9. Christogram - Wikipedia

    en.wikipedia.org/wiki/Christogram

    Chrismon Chi-Rho symbol with Alpha and Omega on a 4th-century sarcophagus (Vatican Museums) A Christogram (Latin: Monogramma Christi) [a] is a monogram or combination of letters that forms an abbreviation for the name of Jesus Christ, traditionally used as a religious symbol within the Christian Church. One of the oldest Christograms is the Chi ...