Mathematics
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M W
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Top posts
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All Questions Answers
Score Newest
answer
17
Why can we take the collection of all open balls?
Sep 3
answer
14
Question about axioms of topology
Aug 25
answer
11
Show that bounded continuous functions on $\Bbb R$ with $f(x)=\int_{x}^{x+1}f(t)\mathrm{d}t$ are constant
Oct 28
answer
11
How to prove that $f(x,y)=xy(x+y)$ isn't surjective as $f:\mathbb{Q}^2\to\mathbb{Q}$.
Oct 16
answer
10
Is $x^3$ really an increasing function for all intervals?
Nov 16
answer
10
Prove that $f(\mathbb R) = \mathbb R$. Partially solved.
Nov 12
answer
9
Example of a uncountable compact metric space with countably infinitely many isometries
yesterday
answer
9
Properties of modular arithmetic without equivalence classes
Aug 18
answer
8
Is it true that if a given equivalence relation is closed, then each equivalence class is closed?
Aug 23
answer
7
The continuity of $g\circ h$ and $h$, and $h$ surjective, imply the continuity of $g$?
Oct 18
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24
Most elementary proof showing that exponential growth wins against polynomial growth

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