Pi

An **pi** o **π** amo an sukol matematika, nga makukuha tikang ha ratio han sirkumperensiya ngadto ha diyametro han usa ka lidong. An balor hini amo hapit ha numero ihap 3.14159.

## Mga pabaro
;Pinanbasaran

;Mga reperensya

*  English translation by Catriona and David Lischka.
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* , English translation by Stephen Wilson.
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## Padugang nga barasahon

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* Borwein, Jonathan and Borwein, Peter, "The Arithmetic-Geometric Mean and Fast Computation of Elementary Functions", *SIAM Review*, **26**(1984) 351–365
* Borwein, Jonathan, Borwein, Peter, and Bailey, David H., *Ramanujan, Modular Equations, and Approximations to Pi or How to Compute One Billion Digits of Pi", *The American Mathematical Monthly*, *'96**(1989) 201–219
* [[Chudnovsky brothers|Chudnovsky, David V.]] and [[Chudnovsky brothers|Chudnovsky, Gregory V.]], "Approximations and Complex Multiplication According to Ramanujan", in ''Ramanujan Revisited'' (G.E. Andrews et al. Eds), Academic Press, 1988, pp 375–396, 468–472
* Cox, David A., "The Arithmetic-Geometric Mean of Gauss", ''L' Ensignement Mathematique'', **30**(1984) 275–330
* [[Jean-Paul Delahaye|Delahaye, Jean-Paul]], "Le Fascinant Nombre Pi", Paris: Bibliothèque Pour la Science (1997) ISBN 2902918259
* Engels, Hermann, "Quadrature of the Circle in Ancient Egypt", ''Historia Mathematica'' **4**(1977) 137–140
* [[Leonhard Euler|Euler, Leonhard]], "On the Use of the Discovered Fractions to Sum Infinite Series", in ''Introduction to Analysis of the Infinite. Book I'', translated from the Latin by J. D. Blanton, Springer-Verlag, 1964, pp 137–153
* Heath, T. L., ''The Works of Archimedes'', Cambridge, 1897; reprinted in ''The Works of Archimedes with The Method of Archimedes'', Dover, 1953, pp 91–98
* [[Christiaan Huygens|Huygens, Christiaan]], "De Circuli Magnitudine Inventa", ''Christiani Hugenii Opera Varia I'', Leiden 1724, pp 384–388
* [[Lam Lay Yong|Lay-Yong, Lam]] and Tian-Se, Ang, "Circle Measurements in Ancient China", ''Historia Mathematica'' **13**(1986) 325–340
* [[Ferdinand von Lindemann|Lindemann, Ferdinand]], [http://gdz.sub.uni-goettingen.de/index.php?id=11&PPN=PPN235181684_0020&DMDID=DMDLOG_0031&L=1 "Ueber die Zahl pi"] , ''Mathematische Annalen'' **20**(1882) 213–225
* Matar, K. Mukunda, and Rajagonal, C., "On the Hindu Quadrature of the Circle" (Appendix by K. Balagangadharan). ''Journal of the Bombay Branch of the Royal Asiatic Society'' **20**(1944) 77–82
* [[Ivan M. Niven|Niven, Ivan]], "A Simple Proof that pi Is Irrational", ''Bulletin of the American Mathematical Society'', **53**:7 (July 1947), 507
* [[Srinivasa Ramanujan|Ramanujan, Srinivasa]], "Modular Equations and Approximations to π", ''Quarterly Journal of Pure and Applied Mathematics'', **XLV**, 1914, 350–372. Reprinted in G.H. Hardy, P.V. Seshu Aiyar, and B. M. Wilson (eds), ''Srinivasa Ramanujan: Collected Papers'', 1927 (reprinted 2000), pp 23–29
* [[William Shanks|Shanks, William]], ''Contributions to Mathematics  Chiefly of the Rectification of the Circle to 607 Places of Decimals'', 1853, pp. i–xvi, 10
* [[Daniel Shanks|Shanks, Daniel]] and [[John Wrench|Wrench, John William]], "Calculation of pi to 100,000 Decimals", ''Mathematics of Computation'' **16**(1962) 76–99
* Tropfke, Johannes, ''Geschichte Der Elementar-Mathematik in Systematischer Darstellung'' (''The history of elementary mathematics''), BiblioBazaar, 2009 (reprint), ISBN 978-1-113-08573-3
* [[François Viète|Viete, Francois]], ''Variorum de Rebus Mathematicis Reponsorum Liber VII. F. Viete, Opera Mathematica'' (reprint), Georg Olms Verlag, 1970, pp 398–401, 436–446
* [[Stan Wagon|Wagon, Stan]], "Is Pi Normal?", ''The Mathematical Intelligencer'', **7*':3(1985) 65–67
* [[John Wallis|Wallis, John]], *Arithmetica Infinitorum, sive Nova Methodus Inquirendi in Curvilineorum Quadratum, aliaque difficiliora Matheseos Problemata*, Oxford 1655–6. Reprinted in vol. 1 (pp 357–478) of *Opera Mathematica*, Oxford 1693
* Zebrowski, Ernest, *A History of the Circle: Mathematical Reasoning and the Physical Universe'', Rutgers University Press, 1999, ISBN 978-0-8135-2898-4

## Mga sumpay ha gawas

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* "Pi" at Wolfram Mathworld
* Representations of Pi at Wolfram Alpha
* Pi Search Engine: 2 billion searchable digits of , , and 
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