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comment The degree of antipodal map, composition of reflections?
possible duplicate of The degree of antipodal map.
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reviewed Close gcd and lcm from prime factorization proof
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reviewed Close Injective hull of $\mathbb{ Z}_n$
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reviewed Close How can i resolve this limit without L'Hopital's Rule?
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reviewed Leave Open How does $A_n$ look in Aut$(X)$?
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reviewed Close distribution of books among students
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reviewed Close Program for writing a Bachelor Thesis.
Aug
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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.
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reviewed Close Cardinality of the real numbers
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reviewed Reject Is $.\overline{9} = 1$?
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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.
Feb
28
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.