mathacademy.com的 10 大竞争对手

mathcentre.ac.uk

mathematics resources for your degree

cut-the-knot.org

an encyclopedic collection of math resources for all grades. arithmetic games, problems, puzzles, and articles

jblanco_60.tripod.com

solve a quadratic equation interactively.

mathdork.com

If you are beginning your preparation for the GRE Quantitative Section, you might start with the Arithmetic chapter in your prep materials. (I recommend the Manhattan 5 lb GRE Practice Problems. ) Keep in mind, though, that the makers of the GRE can and do create spaghetti out of the most basic ar

math.uakron.edu

You belong here! Attend one of the top public universities in Ohio and the nation. Discover The University of Akron’s programs, admissions, and student life.

purplemath.com

When you graph the absolute value of a straight line, you should expect to end up with some sort of "V" shape; the graph should have a sharp turn.

research.att.com

driving innovation for over 140 years, at&t labs is the global leader in development and research of connectivity and technological advancement

mathworld.wolfram.com

A connected graph G is distance-regular if for any vertices x and y of G and any integers i,j=0, 1, ...d (where d is the graph diameter), the number of vertices at distance i from x and distance j from y depends only on i, j, and the graph distance between x and y, independently of the choice of x and y. In particular, a distance-regular graph is a graph for which there exist integers b_i,c_i,i=0,...,d such that for any two vertices x,y in G and distance i=d(x,y), there are exactly c_i...

mersenne.org

great internet mersenne prime search - finding world record primes since 1996. gimps is an organized search for mersenne prime numbers using provided free software.