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user26857
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Because the moderator Alexander Gruber deleted two of my answers I stopped to post answers on this site.

The moderators' abusive behavior continues: they deleted some of my mathematical comments pretending that these cannot be downvoted!!!

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answer
60
Is Pythagoras the only relation to hold between $\cos$ and $\sin$?
Sep 19, 2014
answer
32
Is quotient of a ring by a power of a maximal ideal local?
Apr 9, 2014
answer
22
Integral domain with a finitely generated non-zero injective module is a field
Jun 9, 2014
answer
22
The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$
Dec 7, 2015
answer
20
Does Nakayama Lemma imply Cayley-Hamilton Theorem?
Jul 8, 2015
answer
20
Quotient of polynomials, PID but not Euclidean domain?
Jul 11, 2014
answer
20
Noetherian property for exact sequence
Nov 30, 2014
answer
20
Let $n$ be an integer greater than $1$. In a ring in which $x^n = x$ for all $x$, show that $ab=0$ implies $ba = 0$.
Oct 22, 2015
answer
20
Exercise from Atiyah-Macdonald, Chapter 1, 2.iv)
Feb 24, 2014
answer
18
Finitely many prime ideals lying over $\mathfrak{p}$
Apr 14, 2014
Top Meta posts
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29
What does "low quality contributions" mean and who decides this?
19
How to flag a low quality answer in such a way the community can decide if this has to be deleted or not?
18
Is it possible to withdraw a deletion vote?
17
Protect questions. Practical reasons.
17
Why only 10k+ rep users can see all the deleted questions/answers?
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16
Is a domain all of whose localizations are noetherian itself noetherian ?
11
Are there irreducible ideals that are not primary in $K[X_1,\dots,X_n,\dots]$?
10
Hilbert's Nullstellensatz on polynomials with integer coefficients
9
Radical generation of ideals in Noetherian rings
5
Macaulay's example of prime ideals in $\mathbb C[X_1,X_2,X_3]$ having large number of generators