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Top Questions
13
votes
What is $A\setminus U$ if $U$ is open and $A$ is closed?
homework
general-topology
asked Feb 24, 2013 at 15:49
math.stackexchange.com
8
votes
Construct a convergent series of positive terms with $\displaystyle\limsup_{n\to\infty} {a_{n+1}\over{a_n}}=\infty$
real-analysis
sequences-and-series
divergent-series
asked Feb 12, 2013 at 2:48
math.stackexchange.com
8
votes
Show that open segment $(a,b)$, close segment $[a,b]$ have the same cardinality as $\mathbb{R}$
homework
elementary-set-theory
cardinals
asked Feb 12, 2013 at 2:03
math.stackexchange.com
8
votes
Show that $f$ is uniformly continuous if limit exists
real-analysis
general-topology
continuity
asked Mar 19, 2013 at 14:07
math.stackexchange.com
7
votes
How many solutions does $x^2 \equiv {-1} \pmod {365}$ have?
elementary-number-theory
modular-arithmetic
asked Apr 5, 2013 at 22:37
math.stackexchange.com
7
votes
Rotation of $\mathbb{R}^3$ by using quaternion
geometry
euclidean-geometry
topological-vector-spaces
asked Mar 12, 2013 at 4:47
math.stackexchange.com
5
votes
Intermediate Value Theorem question
real-analysis
general-topology
continuity
asked Mar 11, 2013 at 0:23
math.stackexchange.com
Top Answers
No answers with score of 5 or more
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