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| bio | website | |
|---|---|---|
| location | ||
| age | 29 | |
| visits | member for | 1 year, 4 months |
| seen | Dec 1 '12 at 19:00 | |
| stats | profile views | 59 |
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Mar 16 |
awarded | Revival |
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Jan 19 |
awarded | Yearling |
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Sep 1 |
comment |
Siegel's theorem I'm not sure what means the case $n\to\infty$. However, I don't know more references. |
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Aug 28 |
comment |
Siegel's theorem See Cassels' book (Rational quadratic forms) in the appendix, and Kitaoka's book (Arithmetic of quadratic forms) in Section 6.8. |
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Aug 25 |
revised |
Pullback of differential form on the double covering improved formatting |
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Aug 25 |
suggested | suggested edit on Pullback of differential form on the double covering |
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Aug 25 |
revised |
about the differentiability : the general case added 140 characters in body |
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Aug 25 |
answered | about the differentiability : the general case |
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Aug 25 |
comment |
about the differentiability : the general case The definition of differentiable functions is not correct. The mistake is in the hypothesis "if the partial derivatives of f existi at $x_0$". See en.wikipedia.org/wiki/Differentiable_function |
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Aug 25 |
comment |
about the differentiability : the general case The elements $f(a,b)$ and $f(a_0,b_0)$ are already vectors. |
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Mar 8 |
answered | If A is a finite abelian p-group, then Aut(A) acts transitively on the elements of highest order. |
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Mar 6 |
answered | Unions and intersections of algebraic varieties |
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Feb 1 |
comment |
Image of a map in the complex plane Try to find out the image of the vertical lines $\{(x_0,y) : y>0\}$ for each $x_0\in(-\pi/2,\pi/2)$. I remember something nice was obtained. |
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Jan 31 |
comment |
Simplify _Elementary Calculus_ section 1.6 problem 25 (incorrect transcription) What is the meaning of $st(c)=7$? |
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Jan 30 |
comment |
Harmonic conjugate Maybe the problem is to find an analytic function $F(z)$ with real part $g(z)=g(x,y)$, with an other condition like $F(0)=g(0)$. However, you should rewrite it if you want an answer. |
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Jan 30 |
comment |
Sum of n squares $(x_1^2+x_2^2 + \dots + x_n^2)^2 (y_1^2+y_2^2 + \dots + y_n^2) = z_1^2+z_2^2 + \dots + z_n^2$ Is there a square wrong on $x_1^2+\dots+x_5^2$ in the title and the first equation? |
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Jan 30 |
revised |
Union of dense intervals I added $ characters |
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Jan 30 |
suggested | suggested edit on Union of dense intervals |
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Jan 30 |
comment |
Help to finish my proof: inequality with norm and Schwarz ineq I think it's perfect. Very good. |
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Jan 29 |
answered | Projective space as a manifold |
