Directory: Top/Science/Math/Reference

PlanetMath
A collaborative encyclopaedia with entries contributed under the GNU Free Documentation License.
http://planetmath.org/
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Math2.Org
Formerly Dave's Math Tables. Mathematical tables on-line and downloadable.
http://www.math2.org/
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Digital Library of Mathematical Functions
This mockup gives an idea of the current ideas about the design and organization of the new Digital Library; these ideas are, of course, subject to change. Content only is only available in a few places.
http://dlmf.nist.gov/
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Platonic Realms
Online resource for the mathematics community: links library, bookstore, quotes, and online articles.
http://www.mathacademy.com/pr/index.asp
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Math Assistance
Lists rules and formulas for a number of mathematical subjects, such as plotting graphics, functions, factoring, derivatives, integrals, matrices, vectors, and numerical analysis. In English, French and Turkish languages.
http://www.ercangurvit.com/
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Summation Formulae
For polynomials of degrees up to 50, generated using the Euler-Maclaurin method.
http://polysum.tripod.com/
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Mathematical Atlas
A topical guide to modern mathematics that explains the subdisciplines. Includes graphics that represent their relative size and relationship.
http://www.math.niu.edu/~rusin/known-math/welcome.html
Niu.edu ~ Site Info Whois Trace Route RBL Check

Geometry Formulas and Facts
An excerpt from the 30th Edition of the CRC Standard Mathematical Tables and Formulas, covering the area of Geometry (minus differential geometry), by Silvio Levy.
http://geom.math.uiuc.edu/docs/reference/CRC-formulas/
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Wolfram: Mathematical Functions
Includes advanced formulas and visualizations of various equation, such as elliptical curves.
http://functions.wolfram.com/
Wolfram.com ~ Site Info Whois Trace Route RBL Check

The Math Reference Project
An electronic archive of articles by Karl Dahlke on topics ranging from high school geometry up to graduate level topology.
http://www.mathreference.com/
Mathreference.com ~ Site Info Whois Trace Route RBL Check