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aglearner
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It is great to learn maths on this website.

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201
How to memorise (understand) Nakayama's lemma and its corollaries?
Apr 12, 2011
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185
Great graduate courses that went online recently
Jan 11, 2021
question
69
Is there a "geometric" intuition underlying the notion of normal varieties?
Oct 11, 2012
question
54
Examples in mirror symmetry that can be understood.
Mar 6, 2011
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27
Lunch seminars for PhD students
Oct 15, 2021
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19
A finitely generated $\mathbb{Z}$-algebra that is a field has to be finite
Mar 5, 2011
question
18
The geometric median of a triangle
Jun 1, 2016
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18
The group of isometries of a manifold is a Lie group, isn't it?
Nov 2, 2020
question
17
Rigidity of convex polyhedrons in $\mathbb R^3$ with faces removed
Oct 18, 2017
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17
Explaining the concept of projective space: notes for students
Feb 7, 2012
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11
Binary quadratic forms over Z and class numbers of quadratic fields.
9
Is it true that an ideal is primary iff its radical is prime?
8
Nice exercises on Hilbert's basis theorem
8
Killed in battle / Killed in a battle?
8
It is important that each player not know

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