Stack Exchange

Harald Hanche-Olsen

Trondheim, Norway

https://folk.ntnu.no/hanche/

Main interests: Partial differential equations, especially hyperbolic systems of conservation laws. See my home page if you want to know more.
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Top Questions
Top Answers
152
How do I convince my students that the choice of variable of integration is irrelevant?
math.stackexchange.com

91
Probabilistic Proofs of Analytic Facts
mathoverflow.net

82
Quotes in LaTeX ?
tex.stackexchange.com

63
If $e^A$ and $e^B$ commute, do $A$ and $B$ commute?
math.stackexchange.com

62
Wrong (hyper-)references after resetting chapter counter
tex.stackexchange.com

60
Favorite popular math book
mathoverflow.net

57
What's a good way to write “x does not divide y”?
tex.stackexchange.com

54
Why does the Gamma-function complete the Riemann Zeta function?
mathoverflow.net

54
How to monitor file access for an OS X application?
apple.stackexchange.com

53
What is convolution intuitively?
mathoverflow.net

52
Favorite popular math book
mathoverflow.net

44
Self-Contained Proof that $\sum\limits_{n=1}^{\infty} \frac1{n^p}$ Converges for $p > 1$
math.stackexchange.com

43
Matrix raised to 14th power
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43
Of any 52 integers, two can be found whose difference of squares is divisible by 100
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42
What is the difference between Fragile and Robust commands?
tex.stackexchange.com

42
How to raise a subscript?
tex.stackexchange.com

33
Mathematical symbol for disjoint set union
tex.stackexchange.com

33
Why Do The Axioms of Euclidean Geometry Not Need To Include the Definition of Space?
math.stackexchange.com

32
Visualization of Riemann–Stieltjes Integrals
mathoverflow.net

30
Famous mathematical quotes
mathoverflow.net

29
Roots of truncations of $ e^x - 1$
mathoverflow.net

29
How to define tuples?
mathoverflow.net

29
An example for a calculation where imaginary numbers are used but don't occur in the question or the solution.
math.stackexchange.com

28
Can there be a function that's even and odd at the same time?
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27
Example of continuous function that is analytic on the interior but cannot be analytically continued?
mathoverflow.net

26
What are the worst notations, in your opinion?
mathoverflow.net

26
Strange symbol seen in an article
tex.stackexchange.com

24
Avoiding “rivers” in successive lines of type
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24
I need a proof that a line cannot intersect a circle at three distinct points
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24
Symbol for “care of” (c/o)
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