Josué
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 Jul 24 accepted Matrix Equation: Reduced Row Echelon Form Jul 24 comment Matrix Equation: Reduced Row Echelon Form @Tucker, you are correct for that particular case. Jul 24 asked Matrix Equation: Reduced Row Echelon Form Jul 21 accepted The Mystery of the Número Cabalístico Jul 20 accepted Hestenes' Existence of Extreme Points Jul 20 comment Hestenes' Existence of Extreme Points @user251257 You are right. Thank you for your help. If you write your comments into an answer, then I will accept it. Jul 20 comment Hestenes' Existence of Extreme Points @user251257 I see; the horizontal asymptote is breaking it. Can I still salvage it by requiring that $f (S)$ also be closed? Jul 20 comment Hestenes' Existence of Extreme Points Take $f(x)=x^2$ on $S=(0,\infty)$. Then $\inf_Sf=0$, but there exists no $x_0\in S$ such that $f(x_0)=0$. Jul 20 asked Hestenes' Existence of Extreme Points Jul 16 accepted Dummit & Foote's Abstract Algebra, 3rd Edition, Exercise 0.1.7 Jul 16 asked Dummit & Foote's Abstract Algebra, 3rd Edition, Exercise 0.1.7 Jul 1 awarded Notable Question Jun 15 comment How are basis elements also elements of the topology? +1 It follows by definition. For some reason I thought that I had to demonstrate it. Jun 15 accepted How are basis elements also elements of the topology? Jun 15 asked How are basis elements also elements of the topology? Jun 10 revised Finding the Closed Form of: $\sum\limits_{i=1}^n k\cdot{n-2 \choose k-2}$ The question was bettered. Jun 10 suggested approved edit on Finding the Closed Form of: $\sum\limits_{i=1}^n k\cdot{n-2 \choose k-2}$ May 9 awarded Popular Question May 8 awarded Popular Question Apr 24 comment Continuity Rewritten: $\forall\delta>0,\exists\varepsilon>0\dots$ @BarryCipra, my diction was off: I meant to express "subtle," not "succinct." Thank you.