cut-the-knot.org 的前十大競爭對手

artofproblemsolving.com

Which math books are right for elementary to high school? Follow these guides and curriculum map with suggestions for Beast Academy, AoPS, and Contest Prep.

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...

math.stackexchange.com

Q&A for people studying math at any level and professionals in related fields

brilliant.org

Scientists and mathematicians are increasingly realizing that Bayes' theorem has been missing from historical analysis. In some cases, scientists were unable to do analysis that is now possible with Bayes' theorem; in other cases doctors and scientists failed to apply Bayes' theorem where it was needed, relying instead on frequency probability.[1] This is especially common in medical testing, where tests are said to be ...

maththebeautiful.com

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magmamath.com

K-12 math platform built for real classrooms. Standards-aligned content in 140+ languages, real-time formative insights, ESSA Level II certified. Book a demo.