π

See also: Π [U+03A0 GREEK CAPITAL LETTER PI], ∏ [U+220F N-ARY PRODUCT], ㄇ [U+3107 BOPOMOFO LETTER M], 丌 [U+4E0C CJK UNIFIED IDEOGRAPH-4E0C], 兀 [U+5140 CJK UNIFIED IDEOGRAPH-5140], ㅠ [U+3160 HANGUL LETTER YU], and Appendix:Variations of "p"

π U+03C0, π GREEK SMALL LETTER PI ← ο [U+03BF] Greek and Coptic ρ → [U+03C1]

𝜋 U+1D70B, 𝜋 MATHEMATICAL ITALIC SMALL PI ← 𝜊 [U+1D70A] Mathematical Alphanumeric Symbols 𝜌 → [U+1D70C]

Translingual

This mosaic is outside the mathematics building at the Technische Universität Berlin.

When a circle's diameter is 1 unit, its circumference is π units.

When a circle's radius is 1 unit, its circumference is 2π units.

Symbol

π

1. (mathematics) Pi, an irrational constant representing the ratio of the circumference of a circle to its diameter; approximately 3.14159265.
2. (particle physics) pion, pi meson
3. (mathematics) homotopy group
4. (mathematics) prime-counting function

See also

• π on Wikipedia.Wikipedia

Ancient Greek

Etymology

Derived from its majuscule counterpart Π.

Letter

π • (p) (lowercase, uppercase Π)

1. Lower-case pi (πεῖ), the 16th letter of the ancient Greek alphabet. It represented the voiceless unaspirated bilabial plosive /p/. It is preceded by ο and followed by ρ.

Derived terms

See also pi

• π΄ (p΄), ͵π (͵p)
• п, П (Cyrillic)
• 𐍀 (Gothic)
• ⲡ, Ⲡ (Coptic)
• ∏ (mathematical symbol)

See also

• (Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
• (non-Classical letters) Ϝ ϝ, Ͷ ͷ, Ͱ ͱ, Ϻ ϻ, Ϙ ϙ, Ͳ ͳ
• (punctuation) · ﹔
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨

Greek

Letter

π • (p) (lowercase, uppercase Π)

1. The lower case letter pi (πι), the 16th letter of the modern Greek alphabet.

See also

• π΄ (p΄)
• ͵π (͵p)
• Appendix:Greek alphabet