7,274 reputation
12554
bio website fa.its.tudelft.nl/~teuwen
location Delft, Netherlands
age 28
visits member for 3 years, 11 months
seen Aug 5 '13 at 10:51

About me

I'm a PhD candidate in analysis (harmonic analysis). I have a Master of Science degree in mathematics (analysis).

I am interested in many topics in analysis, but in particular: harmonic analysis, functional analysis, operator theory and special functions.

My email address is jonasteuwen@gmail.com.

I would appreciate it if you would correct my spelling and grammatical errors.


Me elsewhere


Aug
23
comment Convex sequences and Integral representation for the generating function
Oops, you're right about the convexity, I hope it can fix that it is still bounded. You're also right on the positivity. Now I only get a complex valued measure. I hope it is fixable. Sorry for all the corrections, I thought I give it a shot since it was open for several days already, I will think about it some more and if it is not fixable I'll delete it.
Aug
23
revised Convex sequences and Integral representation for the generating function
added 67 characters in body
Aug
23
revised Convex sequences and Integral representation for the generating function
deleted 4 characters in body
Aug
23
revised Convex sequences and Integral representation for the generating function
Shown that the functional is bounded and that the measure is a probability measure.
Aug
23
comment Convex sequences and Integral representation for the generating function
Okay, I see. By the way, I still didn't give an argument why $L$ is bounded, but the convexity does that (I think). I will think about it a little more, probably it is fixable one way or the other. Do you know of the existence of the Hausdorff Moment Problem? Your problem made me think of that.
Aug
21
answered Convex sequences and Integral representation for the generating function
Aug
19
comment Good 1st PDE book for self study
Consider it done.
Aug
19
revised Good 1st PDE book for self study
Added links.
Aug
19
answered Good 1st PDE book for self study
Aug
19
comment Measurable Functions behaviour on $\mathbb{R}^{2}$
What do you call a "better" example?
Aug
19
comment Measurable Functions behaviour on $\mathbb{R}^{2}$
Ah, yes, the function you construct is a common counterexample (In PDE), that I didn't think of that myself :). Nice! It looks correct to me. It is a different approach than mine, so I'm curious if mine works too.
Aug
18
comment Free introductory resources for learning algebra?
I assume you mean the version that isn't called "abstract algebra" and is about groups and such (Lang's book is about that) For self-study I'd suggest you take a look at the Schaum's series about algebra, they are cheap, full of examples and exercises.
Aug
18
revised Invariant Subspaces (Hardy Space)
added 121 characters in body; added 6 characters in body
Aug
18
answered Measurable Functions behaviour on $\mathbb{R}^{2}$
Aug
17
awarded  Supporter
Aug
17
awarded  Teacher
Aug
17
revised Is the closedness of the image of a Fredholm operator implied by the finiteness of the codimension of its image?
Using LaTeX.; added 6 characters in body; added 6 characters in body
Aug
17
answered Is the closedness of the image of a Fredholm operator implied by the finiteness of the codimension of its image?
Aug
14
awarded  Editor
Aug
14
revised Invariant Subspaces (Hardy Space)
added 82 characters in body