Mathematics
John P's user avatar
John P's user avatar
John P's user avatar
John P
  • Member for 7 years
  • Last seen more than a month ago
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Top posts
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All Questions Answers
Score Newest
answer
9
Prove by elementary methods: the plane cannot be covered by countably many copies of the letter "Y"
Nov 14, 2016
question
6
Socle of a direct product of finite groups.
Oct 4, 2018
question
6
Classifying automorphisms using a group presentation.
Mar 3, 2018
question
6
Representation of elements by words on finite groups.
Nov 24, 2017
answer
5
Please explain the intuition behind the dual problem in optimization.
Oct 23, 2019
question
5
Natural isomorphism between $V \otimes V$ and bilinear forms on $V^*$.
Oct 8, 2017
answer
4
Zeno's Achilles & Tortoise - Where exactly is the proof wrong?
Jul 21, 2020
question
4
Image of a superfluous module is superfluous
Feb 23, 2017
answer
4
If $f,g,h$ are functions such that $f \circ g=f \circ h \implies g=h$, how to prove that $f$ is injective?.
Mar 8, 2017
question
3
If $S$ is subnormal in $G$, $S$ is simple and nonabelian and $S \subseteq H \subseteq G$, then $S \subseteq \textrm{Soc}(H)$.
Oct 13, 2018
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7
Why are 3d projections on a 2d screen not like what the human eye sees?

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