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Imago
  • Member for 9 years, 9 months
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45 votes
2 answers
3k views

Why does $ \int_0^1 \lceil { x\sin({1 \over x})} \rceil \,dx = 1 - \frac{\log(4)}{2\pi} $?

9 votes
1 answer
3k views

Running through all permutations of a Rubik's cube [duplicate]

5 votes
1 answer
123 views

Plugging a circle into real polynomial

5 votes
0 answers
310 views

Looking for functions "similar" to the $ \Gamma $ function

4 votes
3 answers
459 views

Are there infinitely many non equivalent metric spaces on certain sets (?)

4 votes
3 answers
7k views

How to compute $ \int e^{-st} \sin(2t) dt $

4 votes
1 answer
116 views

How to approach this sequence? (elementary number theory)

4 votes
2 answers
92 views

Solving $\lim\limits_{x \to 0} \frac{\ln(1+x)}{\ln(1+4x+x^2)}$ without L'Hospital or Sandwiching

3 votes
1 answer
682 views

Solving integral without partial fraction

3 votes
0 answers
85 views

Closed form of $ a_n = 1 - \frac{a_{n-1} a_{n-2}}{4} $

3 votes
3 answers
748 views

How to determine which sets are open in a topology?

3 votes
3 answers
314 views

Example for why K being compact needed.

3 votes
1 answer
261 views

Generalization of a certain riddle and ultrafilters (?)

3 votes
0 answers
53 views

Regarding Feynman Integration - unnamed theorem (?)

2 votes
3 answers
152 views

Coin toss - winning by tossing $k$ heads first

2 votes
1 answer
1k views

Shapes with several focus points

2 votes
1 answer
56 views

Likelihood at least 2 out of $n$ numbers are visible to each other in $\mathbb{Z}^n$

2 votes
1 answer
97 views

Unique factorization problem for s-primes

2 votes
2 answers
110 views

What is a intuitive way to look at substitution?

2 votes
1 answer
49 views

Trying to make sense out of the transcript about divergence theorem

2 votes
0 answers
67 views

Connected points problem for $\mathbb Q$

2 votes
1 answer
127 views

Evaluate $ \int_0^1 \sum_{k=0}^\infty (-x^4)^k dx = \int_0^1 \frac{dx}{1+x^4} $

2 votes
1 answer
36 views

Searching for error reharding computing Fourier coefficient

2 votes
0 answers
65 views

Book or paper recommendation about "Rube Goldberg Mathematics" // e.g. Longest path problems

2 votes
0 answers
45 views

Probability of being able to make an $m$-gon after breaking a stick in $n$ pieces - How to approach this problem?

2 votes
1 answer
203 views

Proof: $x, y$ linear depending $ \Leftrightarrow|\langle x,y\rangle| = ||x|| ||y|| $ [duplicate]

2 votes
2 answers
161 views

Proofing de Movire without Induction and in a neat way

2 votes
1 answer
169 views

Possible mistake in Apostol's book: "An introduction to analytical number theory" (?)

2 votes
1 answer
57 views

Clarification to proposition about limit points

1 vote
0 answers
65 views

Formula for $2$nd order - difference quotient - properties of limits