Etymologie, Étymologie, Etymology
GR Griechenland, la Grèce, Greece
Zahlen, Nombres, Numbers
A
about - Greek Numbers
(E?)(L?) http://ancienthistory.about.com/library/bl/bl_gknumbers.htm
Some Greek cardinal numbers, adverbs and prefixes.
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E
Eptanissa (W3)
= 'die sieben Inseln', so nennen die Griechen auch die 'Ionischen Inseln'. Das sind Ithaki, Kefalonia, Korfu (die Hauptinsel), Kythira, Lefkas, Paxi, Zakynthos.
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Pi (π) - 3,14, Ludolph-Zahl, Ludolph's Constant (W3)
Der 17. Buchstabe des ursprünglichen griechischen Alphabets wird zur Bezeichnung des Verhältnisses von Kreisumfang zu Durchmesser eines Kreises benutzt.
"Pi" geht zurück auf "Peripherie", aus griech. "periphéreia" = "das Herumgehen", "Umlauf". Die irrationale, transzendente Zahl die durch den griech. Buchstaben "pi" ("π") symbolisiert wird, wird auch "Ludolph-Zahl", "Ludolphsche Zahl", engl. "Ludolph's Constant" genannt, nach dem Mathematiker "Ludolph van Ceulen" (1540-1610), der sich intensiv mit "Pi" beschäftigt hat.
(E?)(L?) http://www.angio.net/pi/piquery
(E?)(L?) http://www.cnrtl.fr/etymologie/pi
(E?)(L?) http://www.etymonline.com/index.php?term=pi
(E?)(L?) http://www.etymonline.com/index.php?search=pi
(E?)(L?) http://geometry.net/scientists/ceulen_ludolph_van_page_no_3.php
Ceulen, Ludolph van
(E?)(L?) http://www.heise.de/newsticker/data/as-27.03.03-000/
Primzahlen und Pi: Rekorde, Beweise und Korrelationen
Forscher an der Universität Boston haben interessante statistische Regelmäßigkeiten im Spektrum der Primzahl-Verteilung entdeckt. Wie nature im letzten science update berichtete haben sich Pradeep Kumer et al. mit der Verteilung der Differenzen von Differenzen aufeinanderfolgender Primzahlen (+1, 0,+2,-2 ...) beschäftigt.
(E?)(L1) http://www.joyofpi.com/
The Joy of Pi includes one million digits of pi. - But in case you need just a few, here are the first ten thousand digits.
Mein Geburtstag kommt an der 6.140sten Stelle zum ersten Mal vor. - "The string 0208 was found at position 6140 counting from the first digit after the decimal point. The 3. is not counted."
(E?)(L?) http://www.math.harvard.edu/~elkies/compnt:.html
(E?)(L?) http://lexikon.meyers.de/meyers/Kategorie:Mathematik
Ludolphsche Zahl
(E?)(L?) http://www.piday.org/
"Pi", Greek letter ("π"), is the symbol for the ratio of the circumference of a circle to its diameter. It is approximately 22/7 and is usually calculated to 3 digits, 3.14. With the use of computers, "Pi" has been caculated to over 51 billion decimal places. "Pi" is an irrational number meaning it will continue infinitely without repeating.
The symbol for "pi", "π", was first used in 1737 by William Jones, but was popular after it was adopted by the Swiss mathematician Leonhard Euler in 1737.
(E?)(L?) http://www.pimath.de/quadratur/pi_geschichte2.html#pi162
(E?)(L?) http://oldweb.cecm.sfu.ca/pi/pi.html
The story of pi reflects the most seminal, the most serious and sometimes the silliest aspects of mathematics. A surprising amount of the most important mathematics and a significant number of the most important mathematicians have contributed to its unfolding - directly or otherwise.
Pi is one of the few concepts in mathematics whose mention evokes a response of recognition and interest in those not concerned professionally with the subject. It has been a part of human culture and the educated imagination for more than twenty five hundred years.
The computation of Pi is virtually the only topic from the most ancient stratum of mathematics that is still of serious interest to modern mathematical research. And to pursue this topic as it developed throughout the millennia is to follow a thread through the history of mathematics that winds through geometry, analysis and special functions, numerical analysis, algebra and number theory. It offers a subject which provides mathematicians with examples of many current mathematical techniques as well as a palpable sense of their historical development.
The above passage is taken from the introduction to "Pi : A Source Book" by L. Berggren, J. Borwein and P. Borwein. It is a large collection of papers on pi and will appear with Springer-Verlag sometime in 1997. Much additional material is available in the 1986 Wiley volume "Pi and the AGM" by J. Borwein and P. Borwein.
- Pi Story the history of the computation of Pi
- Pi Records current records of computation
- Pi People people involved in the computation of Pi in recent years
- Pi Literature
- How to Compute 1 Billion Digits of Pi
- How to Compute the 100 Billionth Binary Digit of Pi
- Pi and the AGM
- The Quest for Pi
- Recognizing a Number
- Experimental Pi
- Pi News
- Here at SFU
- Science News
- Globe and Mail
- 21 years ago
- Pi Aesthetics
- Pi Art
- Pi Formulas
- Pi on the net
- Bailey on Pi
- From Number to Formula
- The Miraculous Pi
- The Passion for Pi
- A Question of Numbers
- Pi Files
- Pi and other numbers : The ISC
- More Links to other Pi-Enriched sites
(E?)(L1) http://www-groups.dcs.st-and.ac.uk/~history/BiogIndex.html
Ceulen, Ludolph van | van Ceulen, Ludolph
(E?)(L1) http://pi.lacim.uqam.ca/eng/
- Histoiry of the computation of Pi
- Table of a few approximations of Pi
- A passion for Pi
(E6)(L?) http://www.welt-des-wissens.com/wissen/mathematik.htm
(E?)(L?) http://en.wikipedia.org/wiki/Pi_Day
(E6)(L1) http://mathworld.wolfram.com/letters/L.html
Ludolph's Constant
Prinzip, Principle
eine grundlegende Wahrheit oder Regel, insbesondere moralischen Charakters
von lat. "principalis" = "der Erste", "Führer"; und weiter "*per-" = "vor(wärts)", "vorher"; auch in "privat", "Privileg", engl. "proper", "premier", "prim" ("Primzahl"), "primitiv" von lat. "primus" = "erster"; daher: "Prinz", frz. "prince"; die zweite Silbe "*kap" = "nehmen" steckt in "kapern", engl. "capture" = "fangen", "erobern", engl. "catch", engl. "have".
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