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Greg Egan's user avatar
Greg Egan's user avatar
Greg Egan
  • Member for 12 years, 6 months
  • Last seen more than 2 years ago
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I am a science fiction author and computer programmer.
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39
A curious relation between angles and lengths of edges of a tetrahedron
Jul 23, 2019
question
32
Cubic function $\mathbb{Z}^2 \to \mathbb{Z}$ cannot be injective
May 9, 2021
question
30
When does doubling the size of a set multiply the number of subsets by an integer?
Jul 8, 2018
question
16
Is there a degenerate simplex in $\mathbb{R}^{8 k-1}$ with odd integer edge lengths?
Aug 28, 2021
answer
13
Jacobi's elliptic functions and plane sections of a torus
Feb 3, 2017
answer
12
What algebraic structures are related to the McGee graph?
Sep 17, 2015
answer
11
How to make a sandwich from just one piece of bread?
Jun 21, 2018
answer
11
Moments of area of random triangle inscribed in a circle
Jul 19, 2018
question
10
Why does this antisymmetric product factor out a determinant?
Jul 28, 2014
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10
Factor a sum of products of cofactors
Aug 1, 2014
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Spherical cap area is $\pi r^2$. But why?