pi

Summary

pi is a transcendental number^[1]. pi has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.^[2]

Key Facts

• pi's instance of is recorded as transcendental number^[3].
• pi's instance of is recorded as real number^[4].
• pi's instance of is recorded as mathematical constant^[5].
• pi's instance of is recorded as UCUM constant^[6].
• pi's instance of is recorded as ratio of lengths^[7].
• circle is named after pi^[8].
• Ludolph van Ceulen is named after pi^[9].
• Ludolph van Ceulen is named after pi^[10].
• pi's Commons category is recorded as Pi^[11].
• pi's Unicode character is recorded as π^[12].
• pi's topic's main category is recorded as Category:Pi^[13].
• pi's notation is recorded as pi^[14].
• pi's approximation algorithm is recorded as Gauss–Legendre algorithm^[15].
• pi's approximation algorithm is recorded as Borwein's algorithm^[16].
• pi's approximation algorithm is recorded as Leibniz formula for π^[17].
• pi's approximation algorithm is recorded as Kochański's approximation^[18].
• pi's approximation algorithm is recorded as Chudnovsky algorithm^[19].
• pi's approximation algorithm is recorded as Bailey–Borwein–Plouffe formula^[20].
• pi's approximation algorithm is recorded as Wallis product^[21].
• pi's approximation algorithm is recorded as Machin-like formula^[22].
• pi's approximation algorithm is recorded as Zhao Youqin's π algorithm^[23].
• pi's numeric value is recorded as {'amount': '+3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938'}^[24].
• pi's numeric value is recorded as {'amount': '+3.14'}^[25].
• pi's numeric value is recorded as {'amount': '+4'}^[26].
• pi's described by source is recorded as ISO 80000-2:2019 Quantities and units — Part 2: Mathematics^[27].

Body

Definition and Type

Recorded instance of include transcendental number^[3], real number^[4], mathematical constant^[5], UCUM constant^[6], and ratio of lengths^[7].

Origins

Things named after include circle^[8], a shape^[28] and Ludolph van Ceulen^[9], a mathematician^[29], 1540–1610^[30], specialised in mathematics^[31].

Influence

Things named for pi include 314159 Mattparker^[32], an asteroid^[33]; PiHex^[34], a software^[35]; Super PI^[36], a computer program^[37], founded in 1995^[38]; and Pi Day^[39], an awareness day^[40], founded in 1988^[41].

Why It Matters

pi has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.^[2] pi is known by 84 alternative names across languages and contexts.^[42]

Entities named for pi include 314159 Mattparker^[32], an asteroid^[33]; PiHex^[34], a software^[35]; Super PI^[36], a computer program^[37], founded in 1995^[38]; and Pi Day^[39], an awareness day^[40], founded in 1988^[41].