Gastón Burrull
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 Mar 2 awarded Popular Question Jan 11 comment $G$ faithfully acting on $S$ with $|G|=81$ and $|S|=9$, then the action is transitive I could have raised the question as follows "why all 3-sylows of S_9 are transitive?" but I preferred to put the original question. Thank you anyway. Jan 11 accepted $G$ faithfully acting on $S$ with $|G|=81$ and $|S|=9$, then the action is transitive Jan 11 asked $G$ faithfully acting on $S$ with $|G|=81$ and $|S|=9$, then the action is transitive Nov 23 reviewed Approve Can I avoid the Abel partial summation technique and instead prove uniform convergence in this way? Nov 23 reviewed Approve How to find a bijection from [0,1] into (0,1)? Nov 1 comment Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ Thanks for your multiple answers. Nov 1 accepted Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ Nov 1 comment Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ I did it! I proved it explicity using your hint. If $\gamma$ is such a geodesic in time $t$ I follow the curve until $\gamma(t)$. The fact that the geodesic is unique gives me easily the continuity of the homotopy, I think if $p=-q$ is when the homotopy I think fails to be continuous. Nov 1 comment Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ That is a very good idea, thanks. Nov 1 revised Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ edited body; edited title Nov 1 comment Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ Youre right, I mean $S^n$. I denoted as the symmetric group. Nov 1 asked Fundamental group of $X = \{(p, q)|p \neq −q\}\subset S^n \times S^n$ Oct 3 awarded Popular Question Sep 1 awarded Notable Question Jun 16 reviewed Approve Showing that $\Bbb R^3$ is not homeomorphic to $S^3$. Jun 12 comment Abelian $p$-group with unique subgroup of index $p$ Why every proper subgroup is contained in $H$?, $H$ is maximal, but is not obvious that $H$ is the unique maximal. For example, a group of index $p^2$ could be also a maximal subgroup. Jun 10 reviewed Approve A limit question Jun 9 comment What is the last digit? Or a smaller basis. May 30 comment Proof to show function f satisfies Lipschitz condition when derivatives f' exist and are continuous yes, youre right