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Top Questions
50
votes
Can I make Ctrl+Alt+Del go directly into the task manager in Windows 7?
windows-7
task-manager
ctrl-alt-delete
asked Dec 5 '12 at 4:56
superuser.com
19
votes
How many triangles
combinatorics
puzzle
recreational-mathematics
asked Sep 28 '12 at 8:43
math.stackexchange.com
19
votes
How to convert CharSequence to String in JAVA?
java
string
charsequence
asked Oct 10 '11 at 0:35
stackoverflow.com
16
votes
Calculating $\lim_{n\to\infty}\sqrt{n}\sin(\sin…(\sin(x)..)$
real-analysis
limit
numerical-methods
asked Jan 12 at 0:46
math.stackexchange.com
16
votes
Converting String to long in Java
java
asked Oct 7 '11 at 22:07
stackoverflow.com
12
votes
Proving that every isometry of $\mathbb{R}^n$ is of the form of a composition of at most $n+1$ reflections
geometry
asked Apr 28 '12 at 12:11
math.stackexchange.com
10
votes
Does $\mu^{*}(E)=1$ imply $\mu^{*}(E^{c})=0$ when $\mu$ is an outer measure and the measure of the space is $1$
real-analysis
asked Dec 16 '12 at 23:21
math.stackexchange.com
9
votes
Proving $\sqrt{a+\sqrt{b}}=\sqrt{m}+\sqrt{n}\iff a^{2}-b$ is a square
abstract-algebra
field-theory
asked Sep 9 '12 at 19:58
math.stackexchange.com
8
votes
How does a branch cut define a branch?
complex-analysis
asked Nov 27 '12 at 9:57
math.stackexchange.com
6
votes
$K/E$, $E/F$ are separable field extensions $\implies$ $K/F $ is separable
abstract-algebra
field-theory
galois-theory
asked Jun 6 '12 at 17:22
math.stackexchange.com
1
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Top Answers
26
If $A$ is singular, is $A^3+A^2+A$ singular?
math.stackexchange.com
15
Linear independence of $\sin(x)$ and $\cos(x)$
math.stackexchange.com
11
Solving $5^n > 4,000,000$ without a calculator
math.stackexchange.com
10
For $n∈ N$, determine the real part of $(1 + i\sqrt{3})^{n}$
math.stackexchange.com
9
Prove that $AB=BA=0$ for two idempotent matrices.
math.stackexchange.com
8
If $[L : K ] = n$, then for every irreducible polynomial $f$ is $\operatorname{deg}(f) \le n$.
math.stackexchange.com
7
Appropriate Notation: $\equiv$ versus $:=$
math.stackexchange.com
7
Shortest paths from $s$ by weight which contain even number of edges
math.stackexchange.com
7
Last four digits of $S=9+9^2+9^3+\ldots+9^{400}$
math.stackexchange.com
6
How to show $\mathbb{Q}(\alpha^{4})=\mathbb{Q}(\alpha)$?
math.stackexchange.com
6
Prove that $A=\left(\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right)$ is not invertible
math.stackexchange.com
5
If $I = \langle 2\rangle$, why is $I[x]$ not a maximal ideal of $\mathbb Z[x]$, even though $I$ is a maximal ideal of $\mathbb Z$?
math.stackexchange.com
5
An eigen value problem
math.stackexchange.com
5
Reducing a fraction with the denominator as a root.
math.stackexchange.com
5
Is the group direct sum operation itself a group operation?
math.stackexchange.com
5
Abelian rings question
math.stackexchange.com
5
Number of solutions for sixth order equation
math.stackexchange.com
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