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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.
In Plato's Timaeus, it is explained that the two bands that form the soul of the world cross each other like the letter Χ. Plato's analogy, along with several other examples of chi as a symbol occur in Thomas Browne's discourse The Garden of Cyrus (1658). Chi or X is often used to abbreviate the name Christ, as in the holiday Christmas .
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.
For other symbols, such as the arrow, star, and heart, there isn’t a direct keyboard shortcut symbol. However, you can use a handy shortcut to get to the emoji library you’re used to seeing on ...
Chi with dot above: Arvanitika letter for /xʲ/ [7] Ψ̌ψ̌: Psi with caron: Nonstandard letter for Cypriot Greek [9] and Pontic Greek [10] representing /pʃ/ Ώώ: Omega with acute: High pitch on short vowel or rising pitch on long vowel Ὼὼ: Omega with grave: Archaic letter indicating normal or low pitch ῶ: Omega with circumflex
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.
CYRILLIC CAPITAL LETTER PSI 0471: ѱ: CYRILLIC SMALL LETTER PSI From the Greek letter Ψ ψ. 0472: Ѳ: CYRILLIC CAPITAL LETTER FITA 0473: ѳ: CYRILLIC SMALL LETTER FITA From the Greek letter Θ θ. 0474: Ѵ: CYRILLIC CAPITAL LETTER IZHITSA 0475: ѵ: CYRILLIC SMALL LETTER IZHITSA From the Greek letter Υ υ or Glagolitic Ⱛ ⱛ. 0476: Ѷ
The most common symbols for a wave function are the Greek letters ψ and Ψ (lower-case and capital psi, respectively). Wave functions are complex-valued . For example, a wave function might assign a complex number to each point in a region of space.