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Questions designed to generate a "big list" of certain results, examples, conjectures, etc. via many individual answers, each contributing one or a few instances. Such a question should typically be in Community Wiki mode (CW); after asking, please, flag for moderators attention requesting the question to be made CW.

1 vote

Undergraduate Probability Topics

The Bayer and Diaconis paper, "Trailing the Dovetail Shuffle to its Lair" is a classic and Brad Mann gave a very readable exposition of it. Many people have heard, "seven shuffles are necessary to mi …
11 votes

What are some examples of colorful language in serious mathematics papers?

According to the book "King of Infinite Space" Coxeter, "tickled his readers with unexpected turns of phrase such as": ... dividing the product of the first three expressions by the product of the la …
15 votes

What are some mathematical sculptures?

Adding to the list two of my favorite mathematical sculptors: George Hart: http://www.georgehart.com/sculpture/sculpture.html Bathsheba: http://www.bathsheba.com/ Finally, there are a lot of nice …
43 votes

Most intricate and most beautiful structures in mathematics

The (stable or unstable) homotopy groups of spheres are certainly considered intricate and beautiful by topologists. Here is an interesting (obvious) fact about the stable homotopy groups of spheres …
47 votes

Which math paper maximizes the ratio (importance)/(length)?

Kahn and Kalai's, "A counterexample to Borsuk's conjecture" is a 3-page paper which settles a sixty-year-old conjecture with an explicit counterexample in $\mathbb{R}^{1325}$ (and in all sufficiently …
3 votes

Applications of the notion of of Gromov-Hausdorff distance

Facundo Memoli applied Gromov-Hausdorff distance to shape matching in his Ph.D. thesis. http://math.stanford.edu/~memoli/research.html (Wayback Machine, new website)
33 votes

Open problems in Euclidean geometry?

The Unit Distance Problem asks: For a set of $n$ points in the plane, what is the maximal number $g(n)$ of unit distances realized among the ${n \choose 2}$ pairs? A properly scaled squar …