The ratio of a circle's circumference to its diameter in Euclidean geometry. Irrational and transcendental.
π (pi)
Related concepts
- Real numbers (ℝ)
- τ (tau = 2π)
- ζ(2) = π²/6 (Basel constant)
- K (Sierpiński's constant)
- L (Lévy's constant)
- Reduced Planck constant (ℏ)
- 2019 SI redefinition (fixed constants)
- Fine structure constant α measurement
- Gravitational constant G
- Planck units (length, mass, time)
- Natural units and conversions
- Real Ginzburg-Landau amplitude equation near pattern onset