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Christian Blatter
ETH Zurich (Switzerland)
http://www.math.ethz.ch/~blatter
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Top Questions
20
votes
Probability that $x^2+y^2+z^2=0$ mod $p$
elementary-number-theory
asked Feb 27, 2017 at 20:34
math.stackexchange.com
16
votes
Show $|\int f(z)\, dz|\leq4$
complex-integration
asked Oct 22, 2018 at 7:59
math.stackexchange.com
7
votes
Counting pairs of multisets with prescribed discrepancy
combinatorics
asked May 28, 2018 at 17:40
math.stackexchange.com
Top Answers
147
Connection between Fourier transform and Taylor series
math.stackexchange.com
134
Intuitive interpretation of the Laplacian Operator
math.stackexchange.com
96
20 circles in the plane, all passing through the origin
math.stackexchange.com
87
Is there a clever solution to Arnold's "merchant problem"?
math.stackexchange.com
72
What should be the intuition when working with compactness?
math.stackexchange.com
64
What does the term "undefined" actually mean?
math.stackexchange.com
60
Is math built on assumptions?
math.stackexchange.com
50
Is there a vector space that cannot be an inner product space?
math.stackexchange.com
50
Examples of using physical intuition to solve math problems
mathoverflow.net
49
New Idea to prove $1+2x+3x^2+\cdots=(1-x)^{-2}$
math.stackexchange.com
47
What is the limit of $n \sin (2 \pi \cdot e \cdot n!)$ as $n$ goes to infinity?
math.stackexchange.com
45
Nice proofs of $\zeta(4) = \frac{\pi^4}{90}$?
math.stackexchange.com
45
Representing the multiplication of two numbers on the real line
math.stackexchange.com
45
If you break a stick at two points chosen uniformly, the probability the three resulting sticks form a triangle is 1/4. Is there a nice proof of this?
mathoverflow.net
44
Determine whether $f(x)={\sin x \over x}$ is uniformly continuous in $\mathbb R$
math.stackexchange.com
43
Is 1100 a valid state for this machine?
math.stackexchange.com
42
What is the importance of the Collatz conjecture?
math.stackexchange.com
41
Do there exist pairs of distinct real numbers whose arithmetic, geometric and harmonic means are all integers?
math.stackexchange.com
39
Is there any way to define arithmetical multiplication as other thing than repeated addition?
math.stackexchange.com
38
Nice expression for minimum of three variables?
math.stackexchange.com
37
Appropriate Notation: $\equiv$ versus $:=$
math.stackexchange.com
36
Function satisfying $f^{-1} =f'$
mathoverflow.net
35
Prove that $\sqrt{7}^{\sqrt{8}}>\sqrt{8}^{\sqrt{7}}$
math.stackexchange.com
34
Why do units (from physics) behave like numbers?
math.stackexchange.com
33
Is there an elegant bijective proof of $\binom{15}{5}=\binom{14}{6}$?
math.stackexchange.com
33
The number $2^{29}$ has exactly $9$ distinct digits. Which digit is missing?
math.stackexchange.com
32
Mean Value Theorem for complex functions?
math.stackexchange.com
32
6 women and 4 men wait in line. If their order in line is random, find the probability that all of the women are adjacent to one another.
math.stackexchange.com
31
Show that the equation $\cos(\sin x)=\sin(\cos x)$ has no real solutions.
math.stackexchange.com
31
Why is the Möbius strip not orientable?
math.stackexchange.com
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