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seen Jul 20 '13 at 13:53

Jan
21
answered Invertibility of laplacian operator
Jan
21
comment Invertibility of laplacian operator
You are right, @Tomás.
Jan
14
comment Importance of Toeplitz operators?
Thanks, @HaskellCurry, for your answer. This point is clear now. Your answer is enriching and I'll spend some time learning from it.
Jan
13
awarded  Critic
Jan
9
comment Importance of Toeplitz operators?
@HaskellCurry Really nice answer. But here is a (maybe silly) question: You said "It now follows from Atkinson's Theorem that if $ f $ is invertible, then $ T_{f} $ is a Fredholm operator." Did you really mean "invertible"? Invertible from $ \mathbb{S}^{1}$ to $\mathbb{C} $ ?
Dec
8
comment Uniqueness existence for a PDE
FALSE! Niemeyer is DEAD now.
Oct
29
accepted Finite dimensional quotient $\Rightarrow$ closedness?
Oct
29
asked Finite dimensional quotient $\Rightarrow$ closedness?
Oct
25
comment Redundant condition? What if the image is proper and dense?
Thanks for your comment, @JonasMeyer. My question was "how many dimensions does $L^2/H^1$ have?" (or geometrically: how many dimensions are missing in $H^1$ to complete $L^2$ since $H^1$ is dense in $L^2$?)
Oct
25
comment Redundant condition? What if the image is proper and dense?
Thanks for your comment, @bla. But $H^1(\Omega)$ is dense in $L^2(\Omega)$, what is the codimension of $H^1$? The answer you cited supposes finite codimension to begin with.
Oct
24
awarded  Editor
Oct
24
revised Redundant condition? What if the image is proper and dense?
corrected spelling
Oct
23
asked Redundant condition? What if the image is proper and dense?
Sep
25
awarded  Scholar
Sep
25
accepted Green's function for periodic boundary condition
Sep
24
asked Green's function for periodic boundary condition
Apr
25
awarded  Supporter
Apr
25
awarded  Teacher
Apr
25
awarded  Student
Apr
25
revised Convex hull of sets defined by (in)equalities
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