| Directory > Science > Math > Recreations > Specific Numbers Wikipedia - Mathematical constant
A list of constants with links to more detailed information.
http://en.wikipedia.org/wiki/Mathematical_constant
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Sum Beastliness
Some simple mathematics associated with 666, the Number of the Beast.
http://www.geocities.com/aladgyma/articles/scimaths/666.htm
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Fibonacci Numbers and the Golden section in Nature
Puzzles and things to do, for schools, teachers, colleges up to university level students, or
just for recreation.
http://www.ee.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html
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World of Numbers
Contains a collection of randomly gathered numbers, curios, puzzles, palindromes and primes.
http://www.worldofnumbers.com/
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Vampire Numbers
Numbers with a factorization containing the same digits, e.g. 1530 = 30*51.
http://hjem.get2net.dk/jka/math/vampires
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Ask Dr. Math: History of the Terms Google and Googleplex
Explains how these very large numbers (1 followed by a hundred zeroes, and 1 followed by a google
of zeroes, respectively) were named. With links to references. From Swarthmore's Dr. Math.
http://mathforum.org/library/drmath/view/57575.html
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Jewish Encyclopedia: Numbers and Numerals
Discusses the uses and symbolism of various numbers in Hebrew literature.
http://www.jewishencyclopedia.com/view.jsp?artid=366&letter=N
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Notable Properties of Specific Numbers
A list of numbers with interesting properties.
http://home.earthlink.net/~mrob/pub/math/numbers.html
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The Golden Pentagon
MathPages depiction of tiling a plane using a progression of equilateral triangles dividing a
pentagon. Most interesting is that this pentagon is uniquely and recursively divided by triangles,
just as is seen in the more common recursive division of the Golden Rectangle.
http://mathpages.com/home/kmath153.htm
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Special Numbers
Hierarchy of numbers, constants, primes, pascal's triangle, real numbers, number base sSystems and
fibonacci numbers explained.
http://www.mathreference.net/SpecialNumbers/SpecialNumbers.htm
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Triangular Numbers
Properties of triangular numbers including reversible, happy, harshad, highly composite, deficient,
abundant ones.
http://www.shyamsundergupta.com/triangle.htm
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The Infinitesimal
The infinitesimal is the opposite of infinity, and mathematicians still argue over its existence.
This page probes into one of the wierdest numbers in mathematics.
http://stewy6.tripod.com/infinitesimal.htm
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Fun With Numbers
Includes some lists of numerals, relating to basic operations performed on certain constants. Not
updated since 1995.
http://www.newdream.net/~sage/old/numbers/
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Absolutely Abnormal Numbers
Published as math.NT/0006089, this note investigates numbers that are normal to no base whatsoever,
and writes down explicitly such a number.
http://arxiv.org/abs/math.NT/0006089/
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Catalan Number -- MathWorld
Illustration of the Catalan numbers related to Euler's polygon division problem.
http://mathworld.wolfram.com/CatalanNumber.html
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FAQ on Special Numbers
Answers to Frequently asked questions about special numbers.
http://www.faqs.org/faqs/sci-math-faq/specialnumbers/
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Heilbronn Triangle Constants
Heilbronn Triangle Constants
http://pauillac.inria.fr/algo/bsolve/constant/hlb/hlb.html
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Brun's Constant
Description of the constant, some related work and links to some further reading.
http://pauillac.inria.fr/algo/bsolve/constant/brun/brun.html
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Apéry's Constant
Describes the definition of the constant and some interpretations as well as a list of references
to further work about the constant.
http://pauillac.inria.fr/algo/bsolve/constant/apery/apery.html
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Favorite Mathematical Constants
An in-depth explanation of the most important math constants.
http://pauillac.inria.fr/algo/bsolve/constant/constant.html
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Square root of 2
Provides information about the square root of 2, lists the first 1000 digits and provides links to
pages with up to 5 million digits. Also contains download links for programming libraries for
calculating numbers with high precision or many digits.
http://www.rossi.com/sqr2.htm
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Harry J. Smith's Fun With Mathematics
Fun math stuff, including computing pi, perfect numbers, Fibonacci numbers, the tesseract, a look
into 4-dimensional space.
http://www.netcom.com/~hjsmith/
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Indian numerals
Describes the history of the indian numeral system.
http://www-history.mcs.st-andrews.ac.uk/history/HistTopics/Indian_numerals.html
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Arabic numerals
Describes the history of the arabic numeral system that is in use nearly all over the world today.
http://www-history.mcs.st-andrews.ac.uk/history/HistTopics/Arabic_numerals.html
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Fibonacci Numbers and The Golden Ratio Link Web Page
A long list of links to pages about Fibonacci and his numbers, the golden ratio and applications in
art and science.
http://pw1.netcom.com/~merrills/fibphi.html
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Factoring Fermat Numbers
A contest to find new factors of Fermat numbers. Offers cash prizes for new factors Fn, for n = 12
through 22.
http://www.perfsci.com/prizes.html
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Numbers, Constants and Computation
Mathematical, historical and algorithmic aspects of some classical mathematical constants.
http://numbers.computation.free.fr/Constants/constants.html
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Number Gossip
Numerous special categories of numbers, searchable.
http://www.tanyakhovanova.com/Numbers/
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Pi Squared over Six
Dedicated to the transcendental number pi squared over six.
http://www.pisquaredoversix.force9.co.uk/
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Golden Ratio and Fibonacci Numbers
Provides information about the golden ratio and Fibonacci numbers, and how they relate to biology,
art, and ancient Egyptian art.
http://www.geocities.com/CapeCanaveral/Station/8228/
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Mathematical Constants and Computation
Essays, references, links, software.
http://xavier.gourdon.free.fr/Constants/constants.html
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Mathemagic
In praise of the beauty of the numbers pi, e and phi.
http://members.aol.com/loosetooth/math.html
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RJN's More Digits of Irrational Numbers
Several million digits of e, and the square roots of 2, 3, 5, 6, 7, 8, and 10.
http://antwrp.gsfc.nasa.gov/htmltest/rjn_dig.html
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Inverse Symbolic Calculator
A set of programs and specialized tables of mathematical constants dedicated to the identification
of real numbers.
http://www.cecm.sfu.ca/projects/ISC/
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Verbose.net
Dedicated to the natural order of the universe and to the irrational and logical chaos it presents.
http://www.verbose.net/
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