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"The scientist is not a person who gives the right answers, he is one who asks the right questions."

Claude Levi-Strauss

"It is not the answer that enlightens, but the question."

Decouvertes

"Millions saw the apple fall, but Newton was the one who asked why."

Bernard Baruch

"Ask the right questions. The fastest way to change the answers you receive."

Lee J. Colan

"Questions focus our thinking. Ask empowering questions like: What's good about this? What's not perfect about it yet? What am I going to do next time? How can I do this and have fun doing it?"

Charles Connolly


Dec
14
comment What is the dimension of $A-B$, where $B$ is a subspace of $A$?
@KReiser please try again, the link is fine.
Dec
13
accepted What is the dimension of $A-B$, where $B$ is a subspace of $A$?
Dec
13
comment What is the dimension of $A-B$, where $B$ is a subspace of $A$?
So the author made a mistake?
Dec
13
comment What is the dimension of $A-B$, where $B$ is a subspace of $A$?
Great answer, thank you.
Dec
13
asked What is the dimension of $A-B$, where $B$ is a subspace of $A$?
Dec
8
awarded  Caucus
Dec
8
awarded  Popular Question
Dec
7
accepted How to draw a quotient space
Dec
7
comment How to draw a quotient space
What are these arrows? thank you!
Dec
7
asked How to draw a quotient space
Dec
1
asked could someone help me with this particular detail in this article?
Nov
30
awarded  Popular Question
Nov
25
revised Question about affine coordinate changes
added 1 character in body
Nov
24
comment Question about affine coordinate changes
By definition we have $V^T=V(F_1^T)=V(F_1\circ T)$, where $F_1=a_1x_1+\ldots+a_nx^n$. So I didn't understand why in your example: $V^T=V(X_1)$. According to my calculations we have $V^T=V(F^T)$, where $F^T=a_1^2X_1+(a_1+1)(a_2X_1+\ldots+a_nX_n)$.
Nov
24
comment Question about affine coordinate changes
I didn't understand, so according to your definition $T_1(X)=a_1X_1+\ldots+a_nX_n, T_2(X)=X_2,\ldots,T_n(X)=X_n$, is that right?
Nov
23
awarded  Famous Question
Nov
22
asked Question about affine coordinate changes
Nov
21
asked The definition of codimension
Nov
19
comment Site to find no popular papers/books
@mixedmath do you think University of Hanover could give me this paper?
Nov
19
comment Site to find no popular papers/books
@mixedmath How do you know F. Torres has a copy? thank you