# DonAntonio

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"Points don't matter"... and yet because of these points DIRECTLY most of the misunderstandings and fights among participants happen in this site.

I believe the above would be greatly avoided if people were required to justify, at least shortly, her/his downvote, making it clear it is not personal or petty but more or less well reasoned. If the site would also require from people to write down shortly their personal background in mathematics and this would appear in peoples' profiles then we'd avoid many, many misunderstandings in answers.

I can't agree anymore with the site's outlines of working and neither with the site's administration "making of justice" and direct insinuations of misuse, without possibility of defending oneself and without being able to retort absurd accusations and other nonsenses.

I hereby shall stop my participation in this site at once. This is sad to me because I enjoyed participating here and I myself learned a lot, both from other participants' answers but also from some askers who happened to ask very interesting questions and/or in some very interesting fashion.

Perhaps in the future I shall take part once in a while in this or that thread, but I wouldn't wait for this to happen without getting a chair and a fat book to read.

 91 Why does factoring eliminate a hole in the limit? 57 Find $\lim\limits_{n \rightarrow \infty}\dfrac{\sin 1+2\sin \frac{1}{2}+\cdots+n\sin \frac{1}{n}}{n}$ 45 Is $83^{27} +1$ a prime number? 42 How I can prove that the sequence $\sqrt{2} , \sqrt{2\sqrt{2}}, \sqrt{2\sqrt{2\sqrt{2}}}$ converges to 2? 32 Do all square matrices have eigenvectors?

# 101,252 Reputation

 +10 Why is $X^4+1$ reducible over $\mathbb F_p$ with $p \geq 3,$ prime +10 How many Jordan normal forms are there for this characteristic polynomial? +10 For a finite group of order $2n$ does there exist $x$ such that $x\ast x=e$? +10 Show that $\displaystyle\lim_{x\rightarrow\infty}[e^x-(a_0+a_1x+a_2x^2+\dots+a_Nx^N)]=\infty$

# 9 Questions

 15 Integration by means of complex analysis 9 Complex analysis exercises 7 a) Prove that $f$ has a removable singularity if $f'$ does; b) Evaluate $\int_0^\infty\frac{\log x}{(1+x)^3}\,dx$ 7 A complex map with “bounded” derivative is injective 5 Basic Calculus counterexample

# 347 Tags

 1k calculus × 646 659 real-analysis × 322 1k abstract-algebra × 584 653 sequences-and-series × 289 914 group-theory × 449 548 integration × 300 799 linear-algebra × 498 468 complex-analysis × 294 751 limits × 259 428 algebra-precalculus × 210

# 4 Accounts

 Mathematics 101,252 rep 852139 Academia 161 rep 2 Meta Stack Exchange 101 rep 2 MathOverflow 101 rep 1