Pi (letter)

Pi (uppercase/lowercase Π π), is the letter of the Greek alphabet, used to represent the "p" sound in Ancient and Modern Greek. In the system of Greek numerals, it had a value of 80. Letters that came from it include the Roman P and Cyrillic П.

Pi.svg
Greek alphabet
Αα Alpha Νν Nu
Ββ Beta Ξξ Xi
Γγ Gamma Οο Omicron
Δδ Delta Ππ Pi
Εε Epsilon Ρρ Rho
Ζζ Zeta Σσς 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 Ⱶⱶ Heta
Ϻϻ San Ϙϙ Koppa
Ϡϡ Sampi Ϛϛ Stigma
Ϸϸ Sho

In mathematics, the uppercase pi is used for the Pi product operator (for example. [math]\displaystyle{ \Pi_{i=1}^5 i = 5! }[/math]),[1] similar to the way summation is used. The lowercase pi is used as the mathematical constant pi, also known as Archimedes's constant.[2]

Related pages

References

  1. "Greek/Hebrew/Latin-based Symbols in Mathematics". Math Vault. 2020-03-20. Retrieved 2020-09-22.
  2. "Pi Symbol in Greek Alphabet". www.greeksymbols.net. Retrieved 2020-09-22.