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Happy Pi-Day to everyone !
Today is the internation day of Pi (3/14) where we promote and celebrate the spirit of number Pi ! Make pies, have parties (despite the dark news), take pictures and send them to me so that I can put them on my famous page about the Pi-Day !
At work, we had brownies and we organized a snack-party about Pi ! And you ?
Hello everyone !
Finally, this French website has been translated into English !! Yeahhh ! Many many thanks to Florian Bouyer (first prize), David Jelgersma, Guillaume (Bobest3g), Thomas Robitaille and myself ;-). Since some (all) of these translators were not English-native speakers, I have to ask you to be VERY tolerant regarding the quality of English. If you have time and if you like these pages, any help to correct the English would be very much appreciated, please contact me.
Also, be aware that 50% of the content of pi314.net is more than 10-years old, at a time when the web was still mostly in version 1.0 and when Google had just achieved its first round of equity funding. Thus, this website has to do neither with advanced interfaces nor with blogging, twittering, facebook, Wikipedia or others social modern ideas. Pi314.net is just a personalized collection of 170 pages about the most wonderful number in the universe (to me... no, it really is): Pi. In other words, let's forget about the soulless Pi's page of Wikipedia !! :-) (ok, all right, I like it all the same but it's depressive, isn't it ?)
In this website, you will find here and there some numbers like Axxxxxx which refer to the great website of Neil Sloane : Encyclopedia of Integer Sequences. For instance, you can find Pi's digits here A000796.
Finally, Pi Lovers are encouraged to write and propose new pages on Pi ! Most recent ones by myself have been written using a LaTeX template ( LaTeX template, LyX 1.3 template, about LyX) then converted by Tex4ht from LaTeX to HTML. Thus, in a nutshell, you can send me a LaTeX file with something nice or fun about Pi and roughly following the above template and I will include it in the website (with your name of course) after having converted it. See for instance a page from a great guy with lots of good ideas.
Pi news !
That was the 2018 Pi-Day !
Jonathan Borwein passed away suddenly on August 2nd, 2016, at 65... :-( He was the father of experimental mathematics and he showed a deep interest into Pi as shown on his page... This is really a great loss for the community !
Remember that in december 2009, Fabrice Bellard broke a new Pi-record: the greatest number of digits computed on a personal computer (2700 billions !!). See here the details about this wonderful record ! Well, this record was broke by Alexander J. Yee & Shigeru Kondo on 2010, august 2nd with 5000 billions ! See here the announce and here for details. Well, as a personel computer, it is a monster (see on right) with 12 cores, 96GB of memory and 39TB of hard drive storage. Not exactly the personal computer of everyone...
I still can't believe it but I finally published a research paper on Pi with Jesús Guillera ! :
Construction of binomial sums for π and polylogarithmic constants inspired by BBP formulas, Appl. Math. E-Notes, 7(2007), 237-246.
News of the website
- I'm looking for people correcting and improving the english on this website. If you like this website and even have a few minutes, thank you in advance for your help. |
- Again, a new algorithm from Benoit Cloitre in an Archimedes fashion !!
- A new algorithm from Benoit Cloitre in a continued fraction fashion
- New pages Links, Bibliography and Poems entirely as databases. Thus, you can leave comments and propose your own poems, links or books !
Who are you, dear visitor ?? (11695 votes from a previous poll)
A mathematician (don't be modest) (1519) 13.0%
An undergraduate in maths (2283) Well, say, I just like maths (2132) I'm in high school (2069) Pi and its legend are fun to me (1700) My hobby is more about history, computer programming or music... (470) A web-addict, that's all (650) I just ran into this website unexpectedly (514) Ooops, this is not where I wanted to arrive ! (358)
Sitemap
If this is the first time you're visiting (or even if you're used to come !) it is possible that you are confused with my messy website... Innovation (absolutely...), I made a sitemap available in order to access the wanted webpage quickly ! If you're looking for a given word, do not hesitate to use the search engine at the top of this window
Around the website (Pi, site, me) Whenever I have time, some personal thoughts (likely in french) Get pages from the website The narcissistic page fifteen minutes of glory (in french) Mathematics History of Pi of course ! Mathematicians Al Kashi Geometry Archimedes Geometry Bellard BBP Formula J. and P.Borwein Ultra fast Algos -Ramanujan's formulas Brounker Continued Fractions Brown Number theory Buffon Needle's problem, probabilities G. et D. Chudnovsky Ramanujan's like formulas Cesaro Probabilities Cues Geometry Descartes Geometry Estenave/Fretigny Sums. Residuals theorem. Euler Sums Fibonacci Fibonacci sequence Fourier How to prove Euler's sums Gauss Machin like formula Gosper Strange sums and formulas Huvent Hypergeometric sums Katahiro Geometry Lambert Pi is irrational Leibniz A simple sum Lindemann Pi is a transcendental number Machin A famous sum Mandelbrot/Bolle/Edgar Fractals and Pi Moivre/Stirling Stirling's formula Newton Inverse sinus sum Plouffe BBP formulas Ramanujan Incredible formulas Salamin/Brent Ultra-fast algorithm Viete Geometry Wallis Infinite product Woon Formula All formulas Geometry-based Antiquité - 16e siècle Analysis-based 17e siècle - 19e siècle Modern algorithms 20e siècle Numerical approximations Softwares PiFast 3.2 PiAGM Macintosh Windows Linux UNIX Sun Be-OS OS/2 Amiga CGI Sources-C Turbo-Pascal Classes Java Calculatrices Librairies Misc and personal formulas Lots of formulas ! Hypergeometrical sums Randomness-related phenomena Probability theorems, Brownian motion Complexity Normal numbers, randomness Pi's digits and statistics Fractal dimension, tests on digits, Khintchin's constant Personal ideas BBP sums Chebychev's polynomials Sums Spigot's algorithm How to compute Pi digits by hand The Attic Mixture of unexpected formulas for Pi C(n,k) Triangle Counting Arithmetic functions Gauss, Euler, Moëbius, Zeta New stuff with old stuff ! Improvement of Archimede's formula. By Benoît Cloitre A Xmas formula for Pi by Benoit Cloitre e and Pi in a mirror Two symetrical formulas for e and Pi ! by Benoit Cloitre Pi and Log(2) in a mirror Two continued fractions for Pi and Log(2) by Benoit Cloitre Maths definitions Bernoulli's numbers Digits Methods used in Pi digits computing Aitken's Delta2 Fasten formulas Newton's algorithm Extract roots n-th digit of a number How to use BBP formulas Fast Fourier transform How to multiply two large integers efficiently Computation records Graph of records n-th digit record (base 2) Use of BBP formulas Continued fractions Memory of digits Records announcements Record 04/99 (68m) Details on the record Record 09/99 (206m) same Record 12/2002 (1241m) same Statistics on Pi's digits Frequency of digits 1m digits: text (HTML) 1 million digits Download (stuffit) 1 million digits Download (zip) 1 million digits The world of Pi Poems Poems on or from Pi Papers/videos Research papers Papers from magazines Talks/presentation Videos Simon Plouffe Interview RTL (french) Delirium ! Poll Anecdotes about mathematicians Anecdotes about Pi Short Pi quizz Test your knowledge about Pi Tough Pi quizz Same How many digits do you know ? Pi-day International day of Pi ! Images/Wallpapers About Pi of course Music Pi in music Links about Pi Bibliography Books to have
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Boris Gourévitch
/ CNPS Lab, CNRS, Université of Orsay, Paris XI, France
* Last changes :
Some stuff for Piday 2013 - Digits in a classroom - Update of the Piday Page - The English version !! Everything is new in english ;-)
* Coming next:
Many corrections in english and updates of links, biblio, poems, music and so on...
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This
The
Pi Web Ring site
owned by Boris
GOUREVITCH. |
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Net d'Or 2000 category Science
Interviewed in Radio program Zikweb from RTL on february 10th, 2000. Here is the MP3 in french
Website of the week on september 5th, 1999 on Franco-Science (RIP)
Page of the day in l'actualité du Net, section sciences, 07/08/99
et personal website of the day, 07/07/99 on Interneto
Some other (pretty old !) awards
