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Inverse Symbolic Calculator - http://oldweb.cecm.sfu.ca/projects/ISC/ISCmain.html
A set of programs and specialized tables of mathematical constants dedicated to the identification of real numbers. |
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RJN's More Digits of Irrational Numbers - http://antwrp.gsfc.nasa.gov/htmltest/rjn_dig.html
Several million digits of e, and the square roots of 2, 3, 5, 6, 7, 8, and 10. |
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Mathematical Constants and Computation - http://numbers.computation.free.fr/Constants/constants.html
Essays, references, links, software. |
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Fibonacci Numbers and the Golden section in Nature - http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html
Puzzles and things to do, for schools, teachers, colleges up to university level students, or just for recreation. |
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Wikipedia - Mathematical constant - http://en.wikipedia.org/wiki/Mathematical_constant
A list of constants with links to more detailed information. |
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Number Gossip - http://www.numbergossip.com/
Numerous special categories of numbers, searchable. |
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World of Numbers - http://www.worldofnumbers.com/
Includes a collection of randomly gathered numbers, curios, puzzles, palindromes and primes. |
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Catalan Number -- MathWorld - http://mathworld.wolfram.com/CatalanNumber.html
Illustration of the Catalan numbers related to Euler's polygon division problem. |
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The Golden Pentagon - http://mathpages.com/home/kmath153.htm
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. |
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Triangular Numbers - http://www.shyamsundergupta.com/triangle.htm
Properties of triangular numbers including reversible, happy, harshad, highly composite, deficient, abundant ones. |
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37 Heaven - http://magliery.com/37/
Collects information around the number thirty-seven. |
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Verbose.net - http://www.verbose.net/
Dedicated to the natural order of the universe and to the irrational and logical chaos it presents. |
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Ask Dr. Math: History of the Terms Google and Googleplex - http://mathforum.org/library/drmath/view/57575.html
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. |
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Square root of 2 - http://www.rossi.com/sqr2.htm
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. |
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Friedmann's S-Numbers - http://www.meden.demon.co.uk/Mathematics/S-Numbers/S-Numbers.html
These are numbers where an expression can be given using the operations of addition and squaring, using the digits of a number in order, which gives the original number. Algorithms, theorems and results. |