Noah Snyder
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 Apr3 awarded Great Answer Jan12 awarded Revival Jan1 awarded Good Answer Dec15 awarded Caucus Dec5 comment The degree of antipodal map, composition of reflections? possible duplicate of The degree of antipodal map. Nov13 awarded Notable Question Sep30 awarded Explainer Aug20 reviewed Close gcd and lcm from prime factorization proof Aug20 reviewed Close Injective hull of $\mathbb{ Z}_n$ Aug19 reviewed Close How can i resolve this limit without L'Hopital's Rule? Aug19 reviewed Leave Open How does $A_n$ look in Aut$(X)$? Aug19 reviewed Close distribution of books among students Aug19 reviewed Close Program for writing a Bachelor Thesis. Aug7 comment Is $.\overline{9} = 1$? @Matteo: That's a great way of putting it. Of course it's equivalent to the other definition, but if you only want to talk about infinite decimals you're right that your definition is easier. Aug4 reviewed Close Cardinality of the real numbers Jul20 awarded Yearling May17 reviewed Reject Is $.\overline{9} = 1$? May9 awarded Nice Answer Mar10 comment Proving that $\dim(\mathrm{span}({I_n,A,A^2,…})) \leq n$ Now that the typo is sorted out, if you have a math question that you still need answered then you should edit the question to fix the typos and get it reopened. Feb28 comment Topology - interval homeomorphic to another interval @SKA: For bounded intervals you're going to approach is similarly to the way you approached the other ones: find an explicit continuous function going each way. In this case you can use pretty simple functions. As for why [0,1] and $(-\infty, \infty)$ are not homeomorphic, that's a bit trickier. Once you know about compactness it's easy. The first other approach I can think of is to identify some property that the endpoints have which no interior points can have. For example, any connected open set containing 1 has the property that when you remove 1 its still connected.