BS
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22h |
accepted | regularity of eigenfunctions of Schrödinger Operator |
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22h |
answered | regularity of eigenfunctions of Schrödinger Operator |
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May 16 |
comment |
Triangle area on surfaces of constant curvature What about the scissors congruence definition af area of simple polygons ? |
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May 9 |
revised |
Concrete examples of noncongruence, arithmetic subgroups of SL(2,R) corrected typo; added explanation |
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May 9 |
comment |
Fourier transform of a bounded function No, because modifying the signum function, say on [-1,1], to render it continuous (or even smooth), would just add an $L^1$ function to it, hence a $C_0$ function to its Fourier transform. On the other hand continuous [positive definite][1] functions on $\mathbb{R}$ are exactly the Fourier transforms of finite positive measures, by Bochner's theorem. [1]: en.wikipedia.org/wiki/Positive-definite_function |
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May 9 |
answered | Concrete examples of noncongruence, arithmetic subgroups of SL(2,R) |
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May 9 |
accepted | Fourier transform of a bounded function |
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May 9 |
answered | Fourier transform of a bounded function |
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Mar 23 |
awarded | ● Nice Answer |
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Jan 15 |
comment |
why the group $GL(6,V)$ has an open orbit? The proof is given in section 2, pages 3 to 6, first the complex case, then in the real case. |
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Jan 13 |
comment |
why the group $GL(6,V)$ has an open orbit? This is very well explained in Hitchin's article freely available at arxiv.org/abs/math/0010054v1 |
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Dec 18 |
comment |
Orthogonality (wrt. Ext, Tor) in commutative noetherian rings Could you explain what is $E(R/p)$ ? |
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Nov 30 |
awarded | ● Nice Answer |
