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Steve D

Left math for software, but still like thinking about it.

I used to post a lot on this site; you can still find most of my posts under user641. My favorite.

I'm going to stop posting here for a while (though I still like seeing the inventive and creative questions and answers). I think this site has a real problem with deletions, both from poor question askers and over-aggressive high-rep users. I hope this problem gets resolved.

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  • Stony Brook, NY
  • Member for 5 years, 6 months
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12 infinite abelian group where all elements have order 1, 2, or 4 Aug 16 '17
12 Which finite group is this? Oct 30 '17
10 Moving bricks into piles Oct 26 '16
10 How many nondecreasing functions $f:\{1,2, \ldots, n\} \to \{1,2, \ldots, n\}$ with $f(i)\leq i$ are there? Aug 21 '18
9 Interactive web game for the word problem in groups? Apr 27 '18
7 Find all connected covers of $\mathbb{RP}^2 \vee \mathbb{RP}^2$ Sep 4 '18
7 Embedding of 3-manifold $S^3/Q_8$ in $\mathbb R^4$ Sep 9 '18
7 Diameter of the Symmetric group Sep 21 '18
6 Infinite groups whose non-trivial subgroups are of finite index Mar 19 '16
6 $(N \times M)/G \to M/G$ is a fibration with fibers $N$ Aug 12 '18
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