Mathematics
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RavenclawPrefect
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About

Big fan of interesting math puzzles. I think up lots of questions, and sometimes ask the more interesting/tricky ones here.

Contact me at "graham's number is big" sans punctuation or spaces at gmail, especially if you share my taste in mathematical problems!

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All Questions Answers
Score Newest
question
90
$6!\cdot 7!=10!$. Is there a natural bijection between $S_6\times S_7$ and $S_{10}$?
Nov 11, 2020
question
78
What is the largest volume of a polyhedron whose skeleton has total length 1? Is it the regular triangular prism?
Mar 1, 2021
question
36
Do nonconstructive proofs of isomorphism exist?
Aug 23, 2022
answer
36
Hexagons are best for tiling 2D space in terms of perimeter vs area. What's best for 3D space?
Aug 14, 2022
answer
34
Is there (or can there be) a general algorithm to solve Rubik's cubes of any dimension?
Nov 28, 2020
question
29
How many "prime" rectangle tilings are there?
Feb 1, 2021
question
29
What are the known convex polyhedra with congruent faces?
Oct 31, 2020
question
27
What is the probability that a random walk on $\mathbb{Z}^2$ will hit $(1,0)$ before $(2,0)$?
Feb 6, 2021
question
24
What is the smallest polyomino that can't surround a $1\times 1$ hole?
Jan 15, 2021
question
23
Which convex shapes are the hardest to bind together with a rubber band?
Sep 26, 2020
Top Meta posts
6
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59
What is going on with MSE's "first" question?
41
What is going on with MSE's "first" question?
22
What to do about a user repeatedly posting incorrect answers to the same question?
14
Partially-unresolved questions with substantial progress: should I post a very long question, or a question + answer?
13
Downvoting posts that are very popular but not especially good - is this an acceptable way to vote?
Top network posts
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22
What is the covering density of a very thin annulus? Is it $\frac{\pi\sqrt{51\sqrt{17}-107}}{16}$?
21
Does every 5-celled animal tile the plane?
12
Converting bread recipes for an overnight rise?
10
What are the known convex polyhedra with congruent faces?
9
What is the elemental composition of the Sun overall, rather than at the photosphere?

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