Wanna Hold Your Hand Cifra
Wanna Hold Your Hand Cifra
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Uses: Area of disk · Circumference · In other formulae
Properties: Irrationality · Transcendence · Less than 22/7
Value: Approximations · Memorization
People: Archimedes · Zu Chongzhi · Madhava of Sangamagrama · William Jones · John Machin · John Wrench
History: Chronology · Book
Culture: Legislation · Holiday
Related: Squaring the circle · Basel problem · Other
Piphilology comprises the creation and use of mnemonic techniques to remember a span of digits of the mathematical constant π. The word is a play on Pi itself and the linguistic field of philology. There are many ways to memorize π, including the use of piems (a portmanteau, formed by combining pi and poem), which are poems that represent π in a way such that the length of each word (in letters) represents a digit. Here is an example of a piem: How I need a drink, alcoholic of course [or, in nature] after the heavy lectures involving quantum mechanics. Notice how the first word has 3 letters, the second word has 1, the third has 4, the fourth has 1, the fifth has 5, and so on. The Cadaeic Cadenza contains the first 3834 digits of π in this manner. However, piems prove inefficient for large memorizations of pi. Other methods include remembering patterns in the numbers (for instance, the year 1971 appears in the first fifty digits of pi) and the method of loci (used to memorize π to 65,536 digits).
Until the 20th century, the number of digits of pi which mathematicians had had the stamina to calculate by hand remained in the hundreds, so that memorization of all known digits at the time was possible. In 1949 a computer was used to calculate π to 2000 places, presenting one of the earliest opportunities for a difficult challenge.
Subsequent computers calculated pi to extraordinary numbers of digits (1.7 trillion as of 2010) , and people began memorizing more and more of the output. The world record for the number of digits memorized has exploded since mid-century, and stands at 100,000 as of October 2006. The previous record (83,431) was set by the same person (Akira Haraguchi) on July 2, 2005, and the record previous to that (42,195) was held by Hiroyuki Goto. An institution from Germany provides the details of the “Pi World Ranking”; see the website at http://www.pi-world-ranking-list.com.
Properties: Irrationality · Transcendence · Less than 22/7
Value: Approximations · Memorization
People: Archimedes · Zu Chongzhi · Madhava of Sangamagrama · William Jones · John Machin · John Wrench
History: Chronology · Book
Culture: Legislation · Holiday
Related: Squaring the circle · Basel problem · Other
Piphilology comprises the creation and use of mnemonic techniques to remember a span of digits of the mathematical constant π. The word is a play on Pi itself and the linguistic field of philology. There are many ways to memorize π, including the use of piems (a portmanteau, formed by combining pi and poem), which are poems that represent π in a way such that the length of each word (in letters) represents a digit. Here is an example of a piem: How I need a drink, alcoholic of course [or, in nature] after the heavy lectures involving quantum mechanics. Notice how the first word has 3 letters, the second word has 1, the third has 4, the fourth has 1, the fifth has 5, and so on. The Cadaeic Cadenza contains the first 3834 digits of π in this manner. However, piems prove inefficient for large memorizations of pi. Other methods include remembering patterns in the numbers (for instance, the year 1971 appears in the first fifty digits of pi) and the method of loci (used to memorize π to 65,536 digits).
Until the 20th century, the number of digits of pi which mathematicians had had the stamina to calculate by hand remained in the hundreds, so that memorization of all known digits at the time was possible. In 1949 a computer was used to calculate π to 2000 places, presenting one of the earliest opportunities for a difficult challenge.
Subsequent computers calculated pi to extraordinary numbers of digits (1.7 trillion as of 2010) , and people began memorizing more and more of the output. The world record for the number of digits memorized has exploded since mid-century, and stands at 100,000 as of October 2006. The previous record (83,431) was set by the same person (Akira Haraguchi) on July 2, 2005, and the record previous to that (42,195) was held by Hiroyuki Goto. An institution from Germany provides the details of the “Pi World Ranking”; see the website at http://www.pi-world-ranking-list.com.
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