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Mathematics
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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 3 years, 8 months
  • 665 profile views
  • Last seen Apr 24 at 15:42

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Top posts (100) All Questions Answers | Votes Newest

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
8 Interactive web game for the word problem in groups? Apr 27 '18
6 Diameter of the Symmetric group Sep 21 '18
5 (T/F) A finite group $G$ has a subgroup of index $2$ if and only if its abelianized group $G/[G,G]$ has even order. Aug 6 '17
5 Infinite groups whose non-trivial subgroups are of finite index Mar 19 '16
5 Stabilizer of a Group Action Aug 22 '17
5 How do I find $Z_2(D_8 \times C_2)$? Dec 27 '16
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