Skip to main content

Stack Exchange

Christian Blatter

ETH Zurich (Switzerland)

http://www.math.ethz.ch/~blatter

top accounts reputation activity subscriptions
Top Questions
Top Answers
162
Connection between Fourier transform and Taylor series
math.stackexchange.com

155
Intuitive interpretation of the Laplacian Operator
math.stackexchange.com

100
20 circles in the plane, all passing through the origin
math.stackexchange.com

92
Is there a clever solution to Arnold's "merchant problem"?
math.stackexchange.com

81
What should be the intuition when working with compactness?
math.stackexchange.com

66
What does the term "undefined" actually mean?
math.stackexchange.com

61
Is math built on assumptions?
math.stackexchange.com

58
Is there a vector space that cannot be an inner product space?
math.stackexchange.com

55
What is the remainder when $6^{273} + 8^{273}$ is divided by $49$?
math.stackexchange.com

52
Examples of using physical intuition to solve math problems
mathoverflow.net

52
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

52
New Idea to prove $1+2x+3x^2+\cdots=(1-x)^{-2}$
math.stackexchange.com

51
Representing the multiplication of two numbers on the real line
math.stackexchange.com

51
Appropriate Notation: $\equiv$ versus $:=$
math.stackexchange.com

50
What is the limit of $n \sin (2 \pi \cdot e \cdot n!)$ as $n$ goes to infinity?
math.stackexchange.com

46
Determine whether $f(x)={\sin x \over x}$ is uniformly continuous in $\mathbb R$
math.stackexchange.com

46
Nice proofs of $\zeta(4) = \frac{\pi^4}{90}$?
math.stackexchange.com

45
What is the importance of the Collatz conjecture?
math.stackexchange.com

43
Is 1100 a valid state for this machine?
math.stackexchange.com

41
Do there exist pairs of distinct real numbers whose arithmetic, geometric and harmonic means are all integers?
math.stackexchange.com

41
Nice expression for minimum of three variables?
math.stackexchange.com

39
Is there any way to define arithmetical multiplication as other thing than repeated addition?
math.stackexchange.com

38
Function satisfying $f^{-1} =f'$
mathoverflow.net

38
Mean Value Theorem for complex functions?
math.stackexchange.com

37
Prove that $\sqrt{7}^{\sqrt{8}}>\sqrt{8}^{\sqrt{7}}$
math.stackexchange.com

37
Formal basis for variable substitution in limits
math.stackexchange.com

35
Why do units (from physics) behave like numbers?
math.stackexchange.com

34
Every harmonic function is the real part of a holomorphic function
math.stackexchange.com

34
Why should the substitution be injective when integrating by substitution?
math.stackexchange.com

33
The number $2^{29}$ has exactly $9$ distinct digits. Which digit is missing?
math.stackexchange.com

1 2 3 4 5 … 10