Idan
Reputation
462
Next privilege 500 Rep.
Access review queues
 Mar 27 awarded Benefactor Mar 27 awarded Citizen Patrol Mar 20 awarded Promoter 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)