544 reputation
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bio website robertfilter.net
location Jena, Germany
age 32
visits member for 3 years, 10 months
seen 2 days ago

If you like electrodynamic problems with solutions and their connections to current research, please visit www.problemsinelectrodynamics.com


Jul
21
awarded  Nice Question
Jul
2
awarded  Curious
Jan
2
comment Eigenfunctions of the Helmholtz equation in Toroidal geometry
Dear Shuhao, thanks for your answer, although my thanks is quite late. Thanks for your argumentation and calculation. Most valuable, though, seems to be the reference to Boyer et al., Nagoya Math. J. 60 (1976) you provided and therein, P. Morse and H. Feshbach, "Methods of Theoretical Physics", a must-have.
Dec
31
awarded  Nice Question
May
11
awarded  Popular Question
Oct
21
awarded  Yearling
Oct
6
awarded  Autobiographer
Apr
28
comment A Projection Problem in Functional Analysis - Uniqueness of a Solution
I wanted to know if a certain approach I was using in some paper (arxiv.org/abs/1107.4934) was unique :)
Apr
28
accepted A Projection Problem in Functional Analysis - Uniqueness of a Solution
Apr
28
comment A Projection Problem in Functional Analysis - Uniqueness of a Solution
Thank you oenamen for your answer!
Dec
7
comment Stochastic interpretation of Einstein Equations
Dear @Jon, thank you very much for your answer! Since I think the generalization to a four-dimensional Pseudo-Riemannian manifold is challenging, I appreciate your insightful two dimensional approach very much. Greets
Dec
7
accepted Stochastic interpretation of Einstein Equations
Oct
21
awarded  Yearling
May
21
awarded  Nice Question
May
10
awarded  Nice Question
May
2
comment Is there a definitive guide to speaking mathematics?
Very nice question @Michael and very nice idea for a program! If you can come up with something, this will greatly help a lot of people! Greets
Feb
27
answered Vector multiplication with scalars
Jan
21
comment A Projection Problem in Functional Analysis - Uniqueness of a Solution
@JonasT: Thank you for your thoughts! By the dual I mean it in the sense as in the Dirac notation, en.wikipedia.org/wiki/Bra-ket_notation . What you meantion in your second comment is exactly the problem. If $\alpha$ and $\beta$ are just constants (as I might not have pointed out very direct), taking the Fourier transform and dividing, they will be functions... This is one thing I am puzzled with :) Greets
Jan
20
asked A Projection Problem in Functional Analysis - Uniqueness of a Solution
Jan
20
comment Fourier Transform of an unsteady function
Thank you for the further clarification.