To commemorate the day, enjoy these Pi-related websites.
Artwork
Elias’ Pi Page – Why is pi always written in the decimal number system? Read, listen to, and look at pi in the simplest of all number systems, binary.
Pi Patterns – Images and illustrations created by using the digits of the circle constant.
Sliding Pi – a mosaic tile in a Toronto subway station based on Pi.
Calculating Pi
Archimedes’ Approximation of Pi – The Greek mathematician’s method for approximating the value of pi.
Archimedes and the Computation of Pi – The ancient Greek mathematician’s approach for calculating pi.
Buffon’s Needle: An Analysis and Simulation – Buffon’s Needle is one of the oldest problems in the field of geometrical probability. It was first stated in 1777. It involves dropping a needle on a lined sheet of paper and determining the probability of the needle crossing one of the lines on the page. The remarkable result is that the probability is directly related to the value of pi.
Buffon’s Needle Java Applet – Simulates the calculation of pi using a Monte Carlo method.
Pi and the Fibonacci Numbers – Surprisingly, there are several formulae that use the Fibonacci numbers to compute Pi (Pi). Here’s a brief introduction from scratch to all that you need to know to appreciate these formulae.
Digits of Pi
Pi – Immediately displays the number Pi to over 10 million digits.
Project Gutenberg Pi Listing – 1.25 million digits of Pi available as E-Text from Project Gutenberg.
General Information
Ask Dr. Math: About Pi – A Math Forum which includes a brief history of the number pi.
Digit Connection: The World of Pi – History, little-known facts, poetry, and other facts about the number pi.
Notes on Pi – Offers an introduction to the most famous ratio in mathematics and one of the most ancient numbers known to humanity.
Olle the Greatest’s Page of Pi – Features memorizing techniques, poetry, and the 100 and 1000 clubs.
Pi Trivia Game – How much do you know about everyone’s favorite transcendental number?
Talking About Pi – History, computational methods, literature, art, and more about the magic number pi.
Wikipedia: Pi – Article about the mathematical constant, pi, including its history, appearances in formulae, trivia, and more.
Your Piece of the Pi – This site describes pi’s history, characteristics, and application. It also includes a distributed computing application for finding a large number of digits.
History of Pi
History and Philosophy of Pi – Probably no symbol of infinity in mathematics has evoked as much mystery, romanticism, misconception and human interest as the number and Greek letter of Pi. Interesting facts and trivia about Pi.
Pi Through the Ages – A brief, but intriguing history of Pi, including a Biblical reference.
Holiday
123Greetings.com: Pi Day – Online greetings in celebration of Pi Day.
MathForum: Pi Day – For the celebration of Pi Day in class. Includes problems of the week, literature connections, and online resources.
Piday.org – The official website celebrating Pi.
Pi Approximation Day – 22/7 on the Aneristic Calendar. In U.S. notation, this is rendered as 7/22.
Pi Day Activities – Classroom activities to celebrate a day of mathematics and pi with students.
Pi Day Songs – Some songs you can sing on 3-14.
Slice of Pi, Anyone? – About Pi Day and the transcendental number, by John Shepler.
Wikipedia: Pi Day – Information about the day devoted to the number pi.
Interactive
Color Coded Pi – Play with Pi-inspired color patterns.
The Pi- Search Page – It is believed that any finite sequence of digits will eventually occur in the representation of Pi. Want to find where the first occurrance of your birth date is in the sequence of digits? (Note that this only searches the first 200 million digits so not all long sequences (11 digits or longer) will appear.)
Where is your Birthday – A search engine that tells you where in Pi your birthday first occurs.
Math behind Pi
The 1000 billionth binary digit of PI is 1! – Announcement of the 1000 billionth digit of Pi.
Are the Digits of Pi Really Random? – An article reports progress towards answering the question from a theoretical perspective. This article claims that applying the standard tests used to evaluate “psudo-random sequences” gives the result that Pi is a good but not great source of random digits. Looking at the first 10,000 digits, most would conclude that it really isn’t random. But then, humans are very good at seeing patterns that aren’t there.
Dr. Math Answers Questions About Pi – Addresses student questions regarding how to calculate, formulate, estimate pi.
Elias’ Pi Page – Why is pi always written in the decimal number system? Read, listen to, and look at pi in the simplest of all number systems, the binary.
How Stuff Works: Pi – Animated graphic helps to explain Pi and the different ways of calculating Pi, with some related links.
A New Approach to the Universal Constant – A text that tries to prove that pi is 3.1416 exactly.
Pi is Irrational – The one page proof.
Verbose Pi Page – Pi, phi, Euler’s formula, and other irrational constants.
Memorizing Pi
Pi Memorize – A free windows application used to help memorize the number Pi to 10000 digits.
Pi Memorama – A fun little page about memorizing pi and other numbers.
How to Memorize Pi – Guidance on how to remember this diffuclt number to several decimal places.
Mnemonic Odes to Pi – A number of poems whose word lengths are the digits of pi. Lots of fun.
Notable Memorizers – World records of number of digits memorized, etc.
Merchandise
Joy of Pi – Book by David Blatner, telling the story of pi and humankind’s fascination with it, from Archimedes to the modern day Chudnovsky brothers.
Pi Poster – Buy or download a pdf of Unihedron’s snazzy Pi poster, featuring 350,390 digits of pi in lines containing 600 digits each.
Pi Shop – Provides accessories with Pi-Prints on them. Shirts, mugs and bags.
More Links
Google’s Pi Web Directory
Music
Lucy Scale Developments – Pitch, Pi, and other musical paradoxes.
Microsound: the Pi Project – List members compose musical pieces that use the number/concept in some direct way. All tracks are 3.14 minutes and use pi as a formula in their title.
Pi, Pi, Mathematical Pi – Parody of the song “Bye Bye Miss American Pie” elaborating on the history of pi.
Pi Song Lyrics – A short, original song about Pi.
The Pi Project – Music compilation that will challenge each artist involved to insert a portion of the code for pi into their music.
The Pi Symphony – An orchestral work whose melodic content is derived from the transcendental number Pi. You can purchase a CD of the synthesized version for $15.00. An orchestral work whose melodic content is derived from the transcendental number Pi. You can purchase a CD of the synthesized version for $15.00.
Mysticism
Search for Intelligence in Pi – Search the decimal expansion of pi for messages from God, etc. with an online pi server! Discover the secret to the universe!
The Search for Intelligence in Pi – Statistically, the decimal expansion of Pi is about as random as it gets. The distribution of the digits is nearly perfectly even. In other words, any method for trying to find intelligence in Pi is as likely to be successful as trying to find intelligence in a random stream of numbers. However, this also means that with enough digits, almost any message will appear eventually.
Poetry
Three poems by former CalTech student Eve Andersson: Beauty (Pi in several languages), Pi and Friends, Pi is Transcendental
Infinite Number Poems – The number of letters in each word of this poem represents a digit of pi, beginning with 314. The sound O represents the digit 0.
Trivia
Pi Land – Quiz yourself to find out how much you really know about Pi.
Videos
David Letterman – Math savant Daniel Tammet talks with Dave about how he recited 22,514 digits of Pi on Pi Day 2004.
Maths Pi Song – A song about Pi.
Pi Day Rap – A parody of the rap theme of the of the film 8 Mile.
What is the “Pi” Song? – A brief promo for the PBS series Wired Science.
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bunny harris
