Psi (letter)
letter in the Greek alphabet
Psi (uppercase/lowercase Ψ ψ) is the 23rd letter of the Greek alphabet. It is used to represent the "ps" sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 700. Letters that came from it include Cyrillic Ѱ.
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Greek alphabet | |||
---|---|---|---|
Αα | Alpha | Νν | Nu |
Ββ | Beta | Ξξ | Xi |
Γγ | Gamma | Οο | Omicron |
Δδ | Delta | Ππ | Pi |
Εε | Epsilon | Ρρ | Rho |
Ζζ | Zeta | Σσ | Sigma |
Ηη | Eta | Ττ | Tau |
Θθ | Theta | Υυ | Upsilon |
Ιι | Iota | Φφ | Phi |
Κκ | Kappa | Χχ | Chi |
Λλ | Lambda | Ψψ | Psi |
Μμ | Mu | Ωω | Omega |
Other letters | |||
Ϝϝ | Digamma | Ϟϟ | Koppa |
Ϛϛ | Stigma | Ϡϡ | Sampi |
Ͱͱ | Heta | Ϸϸ | Sho |
Ϻϻ | San | ||
Category•Commons |
In mathematics, the uppercase is used as a variable for sets of sentences (in logic), and the lowercase is used to represent the sum of reciprocals of Fibonacci numbers.[1] Other applications include the polygamma function, the gamma function and the super golden ratio.[2]
Related pages
References
- ↑ "Greek/Hebrew/Latin-based Symbols in Mathematics". Math Vault. 2020-03-20. Retrieved 2020-10-07.
- ↑ "Psi Symbol in Greek Alphabet". www.greeksymbols.net. Retrieved 2020-10-07.