Otavio Kaminski
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 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 Add tags