A number is a mathematical concept used to describe and assess quantity.
The word number can also refer to
Cryptography :: Projects
Counting and Numbers :: Math
Number Theory :: Math

37 Heaven - Collects information around the number thirty-seven.
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.
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.
Meta Description: [ This website aims to show that there are many constants in mathematics other than just e and pi! ]
Arabic numerals - Describes the history of the arabic numeral system that is in use nearly all over the world today.
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.
Meta Description: [ Who coined the phrase ]
Brun's Constant - Description of the constant, some related work and links to some further reading.
Meta Description: [ This website aims to show that there are many constants in mathematics other than just e and pi! ]
Catalan Number -- MathWorld - Illustration of the Catalan numbers related to Euler's polygon division problem.
Catalan's Constant - G - Describes the mathematics behind the constant.
Deep Thought - 42 - A website devoted to tracking the Ultimate Answer provided by the computer Deep Thought. Lists sightings of the number since early history.
Euler-Mascheroni Constant - g - Describes the mathematics behind this constant.
FAQ on Special Numbers - Answers to Frequently asked questions about special numbers.
Favorite Mathematical Constants - An in-depth explanation of the most important math constants.
Meta Description: [ This website aims to show that there are many constants in mathematics other than just e and pi! ]
Feigenbaum Constants - Describes the constants and their mathematical basis.
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.
Meta Description: [ Fibonacci numbers and the golden section
in nature; seeds, flowers, petals, pine cones, fruit and vegetables. Is there
a pattern to the arrangement of leaves on a stem or seeds on a flwoerhead? Yes!
Plants are actually a kind of computer and they solve a particular
packing problem very... ]
Friedmann's S-Numbers - 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.
Fun With Numbers - Includes some lists of numerals, relating to basic operations performed on certain constants. Not updated since 1995.
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.
Meta Description: [ Anytime, anywhere, EarthLink connects people to the power and possibilities of the Internet. Connect to the Internet with High Speed, DSL, Cable, Satellite, Voice, trueVoice, Samsung Wireless, Dial-up. ]
Heilbronn Triangle Constants - Heilbronn Triangle Constants
Meta Description: [ This website aims to show that there are many constants in mathematics other than just e and pi! ]
Indian numerals - Describes the history of the indian numeral system.
Inverse Symbolic Calculator - A set of programs and specialized tables of mathematical constants dedicated to the identification of real numbers.
Jewish Encyclopedia: Numbers and Numerals - Discusses the uses and symbolism of various numbers in Hebrew literature.
Meta Description: [ The letters of the alphabet were used as numerical symbols as early as the Maccabean period (comp. Numismatics). Whether such ... ]
Just Who is Mr. 666? - Uses gematria to calculate the number of the beast, and evaluates what it may mean w/r specific Hebrew words and names in the Bible adding up to 666.
Meta Description: [ 666. Who is Mr. 666? The few Hebrew words in the Bible that add up to 666 will be evaluated. ]
Mathemagic - In praise of the beauty of the numbers pi, e and phi.
Mathematical Constants and Computation - Essays, references, links, software.
Meta Description: [ This site is
dedicated to mathematical and algorithmic aspects of
classical mathematical constants. Programs are included and can
be downloaded. Mathematical constants are also the starting point
to discover other areas of mathematics ]
Number Gossip - Numerous special categories of numbers, searchable.
Pi Squared over Six - Dedicated to the transcendental number pi squared over six.
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.
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.
Stewy's Site - The infinitesimal is the opposite of infinity, and mathematicians still argue over its existence. This page probes into one of the weirdest numbers in mathematics.
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.
Triangular Numbers - Properties of triangular numbers including reversible, happy, harshad, highly composite, deficient, abundant ones.
Meta Description: [ Curious properties of triangular numbers including reversible, happy, harshad, highly composite, deficient, abundant triangular numbers ]
Vampire Numbers - Numbers with a factorization containing the same digits, e.g. 1530 = 30*51.
Meta Description: [ Vampire numbers ]
Verbose.net - Dedicated to the natural order of the universe and to the irrational and logical chaos it presents.
Meta Description: [ The Verbose Pi Page ]
Wikipedia - Mathematical constant - A list of constants with links to more detailed information.
World of Numbers - Contains a collection of randomly gathered numbers, curios, puzzles, palindromes and primes.
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