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Aug
18
revised Primitive polynomials $P$ with $\gcd(P(x),P(y))=1$ for infinitely many $x,y$
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Aug
18
revised Primitive polynomials $P$ with $\gcd(P(x),P(y))=1$ for infinitely many $x,y$
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Aug
18
revised Primitive polynomials $P$ with $\gcd(P(x),P(y))=1$ for infinitely many $x,y$
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Aug
18
answered Primitive polynomials $P$ with $\gcd(P(x),P(y))=1$ for infinitely many $x,y$
Aug
14
comment Structure of first-coordinate-projection of set of solutions of “elliptic” diophantine equation $xy(6-(x+y))=6$
@NoamD.Elkies thanks for your clear explanation.
Aug
13
comment Does $\cos (\pi/5)$ belong to $\mathbb{Q} (\sin(\pi/5))$?
@Alex-omsk I think you're making it more complicated than it is. You don't like my suggestion ? You don't like Euler's identities ?
Aug
13
revised Does $\cos (\pi/5)$ belong to $\mathbb{Q} (\sin(\pi/5))$?
deleted 2 characters in body
Aug
13
answered Does $\cos (\pi/5)$ belong to $\mathbb{Q} (\sin(\pi/5))$?
Aug
10
comment Structure of first-coordinate-projection of set of solutions of “elliptic” diophantine equation $xy(6-(x+y))=6$
@mercio I'm not very familiar with elliptic curves and I must be missing something, but how does a positive rank garantee density ? If I understood correctly, here we have an elliptic curve of rank 1, so the group has a subgroup isomorphic to $\mathbb Z$. But ${\mathbb Z}\times \lbrace 0 \rbrace$ is isomorphic to $\mathbb Z$ and yet is not dense anywhere
Aug
9
asked Structure of first-coordinate-projection of set of solutions of “elliptic” diophantine equation $xy(6-(x+y))=6$
Aug
8
comment Homogeneous diophantine equation $x^3+2y^3+6xyz=3z^3$
@GerryMyerson Thanks to Jesper Petersen's helpful answer, I know a lot of them : (-16307,-9281,8747), (-259124723,209103562,2727323) etc.
Aug
8
comment Homogeneous diophantine equation $x^3+2y^3+6xyz=3z^3$
@ByronSchmuland corrected, thanks
Aug
8
revised Homogeneous diophantine equation $x^3+2y^3+6xyz=3z^3$
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Aug
7
revised Homogeneous diophantine equation $x^3+2y^3+6xyz=3z^3$
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Aug
7
asked Homogeneous diophantine equation $x^3+2y^3+6xyz=3z^3$
Aug
6
accepted Is $a=\frac{1992!-1}{3449\times 8627}$ a prime number?
Aug
5
awarded  Good Question
Aug
2
comment Abel-Ruffini theorem, Galois theory and minima and maxima
@lhf The wikipedia link you gave does use Galois theory (both the notion and the name).
Aug
1
awarded  Popular Question
Jul
31
comment Abel-Ruffini theorem, Galois theory and minima and maxima
Are you expecting to "show the Abel-Ruffini theorem in just one special case" without showing it in full generality ? This would probably amount to a significantly simpler proof of Abel-Ruffini than all those currently known.