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Top Questions
468
votes
How to convert String to long in Java?
java
string
asked Oct 7, 2011 at 22:07
stackoverflow.com
264
votes
How can I remove a substring from a given String?
java
string
asked Oct 15, 2011 at 2:31
stackoverflow.com
246
votes
How to convert CharSequence to String?
java
string
charsequence
asked Oct 10, 2011 at 0:35
stackoverflow.com
162
votes
How to convert ASCII code (0-255) to its corresponding character?
java
ascii
asked Oct 8, 2011 at 0:26
stackoverflow.com
104
votes
If $S$ is an infinite $\sigma$ algebra on $X$ then $S$ is not countable
real-analysis
measure-theory
proof-explanation
asked Mar 4, 2013 at 1:36
math.stackexchange.com
62
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, 2012 at 4:56
superuser.com
49
votes
How many triangles
combinatorics
puzzle
recreational-mathematics
asked Sep 28, 2012 at 8:43
math.stackexchange.com
48
votes
How to change the order of summation?
summation
asked Jul 31, 2016 at 13:09
math.stackexchange.com
42
votes
Using ListView : How to add a header view?
android
android-listview
asked Nov 2, 2011 at 9:49
stackoverflow.com
31
votes
Calculating $\lim_{n\to\infty}\sqrt{n}\sin(\sin...(\sin(x)..)$
real-analysis
limits
numerical-methods
asked Jan 12, 2013 at 0:46
math.stackexchange.com
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Top Answers
49
Linear independence of $\sin(x)$ and $\cos(x)$
math.stackexchange.com
31
If $A$ is singular, is $A^3+A^2+A$ singular?
math.stackexchange.com
25
Generalized rotation matrix in N dimensional space around N-2 unit vector
math.stackexchange.com
18
Prove if $n^2$ is even, then $n$ is even.
math.stackexchange.com
17
Is $\{0\}$ a field?
math.stackexchange.com
16
Appropriate Notation: $\equiv$ versus $:=$
math.stackexchange.com
16
I have the pattern: 1 + 2 + 3 + 4 + 5 + 6, but I need the formula for it
math.stackexchange.com
15
Does there exist a bijection between empty sets?
math.stackexchange.com
14
Where is the difference between the union and sum of sets?
math.stackexchange.com
13
Why do you add +1 in counting test questions?
math.stackexchange.com
13
For a set $A$ what is $A^0$?
math.stackexchange.com
11
Solving $5^n > 4,000,000$ without a calculator
math.stackexchange.com
11
How to show $\mathbb{Q}(\alpha^{4})=\mathbb{Q}(\alpha)$?
math.stackexchange.com
10
Are all infinities equal?
math.stackexchange.com
10
If $[L : K ] = n$, then for every irreducible polynomial $f$ is $\operatorname{deg}(f) \le n$.
math.stackexchange.com
10
For $n∈ N$, determine the real part of $(1 + i\sqrt{3})^{n}$
math.stackexchange.com
9
Distribution of a binomial variable squared
math.stackexchange.com
9
Prove that $AB=BA=0$ for two idempotent matrices.
math.stackexchange.com
9
Shortest paths from $s$ by weight which contain even number of edges
math.stackexchange.com
9
Clarification on proof: Order of left cosets equal
math.stackexchange.com
8
I can't understand logical implication
math.stackexchange.com
8
Trouble understanding Sum of Subspaces
math.stackexchange.com
8
Notation showing a set is non-empty and finite
math.stackexchange.com
8
Is a rational-valued continuous function $f\colon[0,1]\to\mathbb{R}$ constant?
math.stackexchange.com
8
Irreducibility of $X^{p-1} + \cdots + X+1$
math.stackexchange.com
7
Why isn't the quotient space $V/V = \{ V \}$?
math.stackexchange.com
7
$A$ matrix, $+i, -i$ are eigenvalues.
math.stackexchange.com
7
Why do we say $n$ distinct points?
math.stackexchange.com
7
Last four digits of $S=9+9^2+9^3+\ldots+9^{400}$
math.stackexchange.com
7
Set intersection the same as logical conjunction?
math.stackexchange.com
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