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visits member for 2 years
seen Dec 20 '13 at 13:16

Aug
15
awarded  Yearling
Jul
2
awarded  Curious
Aug
15
awarded  Yearling
Jul
20
comment How does one show a topological space is metrizable? Using text Intro. to Topo. by Mendelson
Hausdorff is one of the separation axioms. You'll get to that later.
Jul
20
answered How does one show a topological space is metrizable? Using text Intro. to Topo. by Mendelson
Jul
14
comment Definition of the fundamental group
It won't be even associative. The proof of associativeness and many other qualities uses homotopy between the source and outcome loops.
Jul
13
accepted Is $\{ a-b=y, a \oplus b=x \}$ solvable?
Jul
13
comment Is $\{ a-b=y, a \oplus b=x \}$ solvable?
maybe in other cases, where a cannot be b so x,y cannot be 0?
Jul
13
asked Is $\{ a-b=y, a \oplus b=x \}$ solvable?
Jul
5
accepted If the * of morphisms (poly. maps) are equal, are the morphisms equal?
Jul
5
comment If the * of morphisms (poly. maps) are equal, are the morphisms equal?
Great! is there a consequence for the fact that there is a fully faithful functor between those (or any two) categories?
Jul
5
comment If the * of morphisms (poly. maps) are equal, are the morphisms equal?
For $t:X\rightarrow Y$, then $t_*:k[Y]\rightarrow k[x] : t_*(f(x))=f(t(x))$, so $t_*$ is a morphism between rings as is $\tau$, and * is the functor. But as I said, we never used words like functor in the lecture so I might be wrong about my definitions.
Jul
5
revised If the * of morphisms (poly. maps) are equal, are the morphisms equal?
added 209 characters in body
Jul
5
asked If the * of morphisms (poly. maps) are equal, are the morphisms equal?
Jun
28
comment Calculate the homology of $X$.
I just thought you could give me a quick reference. Well, the reference you gave me is a .ps, so you're not making this easy on me. Thanks anyway!
Jun
28
comment Calculate the homology of $X$.
I'm not the one asking the question, and I'm not interested in this specific result, I am interested in what is a collared pair and why it induces that isomorphism, however...
Jun
28
comment Calculate the homology of $X$.
What is a collared pair? (Couldn't find that book online)
Jun
19
comment Ideas for a present to my topology teacher
Thanks for the suggestion!
Jun
19
comment Ideas for a present to my topology teacher
Great suggestion!
Jun
18
asked Ideas for a present to my topology teacher