- (mathematics) Product over a set of like terms:
- (mathematics, logic, computer science) A class (in some hierarchy of formulae, like the arithmetical hierarchy or polynomial hierarchy) of those formulae whose outermost quantifiers are universal quantifiers.
- (mathematics): Though there exists a distinct code point (∏) for the purpose of the mathematical product, the upper case pi here continues to be used for convenience.
Π • (P) (uppercase, lowercase π)
- The upper case letter pi (πι), the 16th letter of the modern Greek alphabet.
- (Greek-script letters) Α α (A a), Β β (B b), Γ γ (G g), Δ δ (D d), Ε ε (E e), Ζ ζ (Z z), Η η (Ē ē), Θ θ (Th th), Ι ι ℩ (I i ℩), Κ κ (K k), Λ λ (L l), Μ μ (M m), Ν ν (N n), Ξ ξ (X x), Ο ο (O o), Π π (P p), Ρ ρ (R r), Σ σ ς (S s s), Τ τ (T t), Υ υ (U u), Φ φ (Ph ph), Χ χ (Kh kh), Ψ ψ (Ps ps), Ω ω (Ō ō)
- (punctuation) · ;
- (diacritics) ᾿ ῾ ´ ` ῀ ¨ ¯ ˘