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Top Questions
46
votes
Why do we write proofs "forward?"
proof-writing
asked Dec 31, 2011 at 17:59
math.stackexchange.com
25
votes
Interpreting the significance of Darboux's Theorem
calculus
real-analysis
asked Dec 3, 2011 at 3:47
math.stackexchange.com
19
votes
How to prove $\sin(1/x)$ is not uniformly continuous
calculus
asked Nov 6, 2011 at 21:53
math.stackexchange.com
16
votes
Example of a function that is not twice differentiable
calculus
asked Nov 4, 2011 at 2:15
math.stackexchange.com
11
votes
Countable or uncountable set 8 signs
combinatorics
elementary-set-theory
asked Nov 2, 2011 at 0:17
math.stackexchange.com
9
votes
Proof: If $f'=0$ then is $f$ is constant
calculus
asked Nov 6, 2011 at 18:05
math.stackexchange.com
7
votes
Prove the integral of $f$ is positive if $f ≥ 0$, $f$ continuous at $x_0$ and $f(x_0)>0$
integration
proof-writing
asked Nov 16, 2011 at 22:02
math.stackexchange.com
7
votes
Wrong Definition of a Limit
calculus
limits
asked Oct 18, 2011 at 23:47
math.stackexchange.com
7
votes
Lipschitz at every point in $[a,b]$ but not Lipschitz on $[a,b]$?
calculus
asked Oct 24, 2011 at 2:40
math.stackexchange.com
5
votes
Is this proof wrong?
polynomials
proof-writing
asked Dec 31, 2011 at 18:27
math.stackexchange.com
Top Answers
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