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mrf

Lund, Sweden

http://www.maths.lth.se/matematiklth/personal/frankw/

Associate professor, Lund University. Research interests: several complex variables, in particular pluripotential theory.

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162
math fallacy problem: $-1= (-1)^3 = (-1)^{6/2} = \sqrt{(-1)^6}= 1$?
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109
Why isn't several complex variables as fundamental as multivariable calculus?
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56
What does it mean to divide a complex number by another complex number?
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46
Find all five solutions of the equation $z^5+z^4+z^3+z^2+z+1 = 0$
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39
Nuking the Mosquito — ridiculously complicated ways to achieve very simple results
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34
Proof of Frullani's theorem
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28
Is there an algorithm to compute the degree of a polynomial?
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25
Examples of mathematical induction
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24
Automorphisms of the complex plane
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24
What is the Fourier transform of $f(x)=e^{-x^2}$?
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23
Calculus: a very serious L'Hopital's Rule problem
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22
How many ways can seven people sit around a circular table?
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19
Eigenvector and eigenvalue for exponential matrix
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16
Can we write a complex number z like this Re(z)+Im(z)?
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16
For every rational number, does there exist a sequence of irrationals which converges to it?
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15
How to evaluate the sum $\frac{1}{\sqrt{n}}+\frac{1}{\sqrt{2n}}+\cdots+\frac{1}{\sqrt{n^2}}$ when $n$ grows?
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14
If a graph with $n$ vertices and $n$ edges there must a cycle?
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14
A really complicated calculus book
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13
Pointwise convergence of sequences of holomorphic functions to holomorphic functions
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13
How to find the roots of $x^4 +1$
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13
Solve $z^4+1=0$ algebraically
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13
'Nudging' overset characters downwards
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12
Multivariate Residue Theorem?
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12
Conformal Map from Vertical Strip to Unit Disc
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12
Why $\lim_{z\to\infty}\frac{\sin(z)}z$ doesn't exist?
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12
Complex analysis book for Algebraic Geometers
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11
What does it mean to show that something is well defined?
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11
Can a function be analytic and satisfy $f\left(\frac 1 n\right) =\frac{1}{\log{n}}.$?
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11
Mellin transform of $\sin x$ aka $\int^{\infty}_0 x^{s-1}\sin x dx $
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11
Study continuity of this function
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