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  2. Epsilon - Wikipedia

    en.wikipedia.org/wiki/Epsilon

    The lunate epsilon, ϵ , is not to be confused with the set membership symbol ∈. The symbol ∈ {\displaystyle \in } , first used in set theory and logic by Giuseppe Peano and now used in mathematics in general for set membership ("belongs to"), evolved from the letter epsilon, since the symbol was originally used as an abbreviation for the ...

  3. Unicode compatibility characters - Wikipedia

    en.wikipedia.org/wiki/Unicode_compatibility...

    Greek letter based symbols (7): beta (ϐ U+03D0), theta (ϑ U+03D1), phi (ϕ U+03D5), pi (ϖ U+03D6), kappa (ϰ U+03F0), rho (ϱ U+03F1), capital theta (ϴ U+03F4) While these compatibility characters are distinguished from their compatibility decomposition characters only by adding the word "symbol" to their name, they do represent long ...

  4. 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.

  5. Mathematical operators and symbols in Unicode - Wikipedia

    en.wikipedia.org/wiki/Mathematical_operators_and...

    greek beta symbol u+03d1: ϑ: greek theta symbol u+03d2: ϒ: greek upsilon with hook symbol u+03d5: ϕ: greek phi symbol u+03f0: ϰ: greek kappa symbol u+03f1: ϱ: greek rho symbol u+03f4: ϴ: greek capital theta symbol u+03f5: ϵ: greek lunate epsilon symbol u+03f6 ϶ greek reversed lunate epsilon symbol

  6. Duplicate characters in Unicode - Wikipedia

    en.wikipedia.org/wiki/Duplicate_characters_in...

    Unicode aims at encoding graphemes, not individual "meanings" ("semantics") of graphemes, and not glyphs.It is a matter of case-by-case judgement whether such characters should receive separate encoding when used in technical contexts, e.g. Greek letters used as mathematical symbols: thus, the choice to have a "micro-sign" µ separate from Greek μ, but not a "Mega sign" separate from Latin M ...

  7. 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.

  8. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    u+037b ͻ greek small reversed lunate sigma symbol; u+037c ͼ greek small dotted lunate sigma symbol; u+037d ͽ greek small reversed dotted lunate sigma symbol; u+03a3 Σ greek capital letter sigma (σ) u+03c2 ς greek small letter final sigma (ς, ς, ς) u+03c3 σ greek small letter sigma (σ) u+03f2 ϲ greek ...

  9. List of Greek letters - Wikipedia

    en.wikipedia.org/wiki/List_of_Greek_letters

    This is a list of letters of the Greek alphabet. The definition of a Greek letter for this list is a character encoded in the Unicode standard that a has script property of "Greek" and the general category of "Letter". An overview of the distribution of Greek letters is given in Greek script in Unicode.