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Jul
25
revised The Matrix of $T$ Relative to the Ordered Bases $\mathcal B$ and $\mathcal B'$ for $V$
added 11 characters in body
Jul
25
asked The Matrix of $T$ Relative to the Ordered Bases $\mathcal B$ and $\mathcal B'$ for $V$
Jul
25
comment Basis, Ordered Basis, and Linear Independence
@SolidSnake, I see. What if it is an ordered basis?
Jul
25
asked Basis, Ordered Basis, and Linear Independence
Jul
24
comment Matrix Equation: Reduced Row Echelon Form
Brilliant! I also see the connection between this and Solid Snake's comment regarding elementary matrices.
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?