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On two-parametric family of quartic Thue equations

Borka Jadrijević (2005)

Journal de Théorie des Nombres de Bordeaux

We show that for all integers m and n there are no non-trivial solutions of Thue equation x 4 - 2 m n x 3 y + 2 m 2 - n 2 + 1 x 2 y 2 + 2 m n x y 3 + y 4 = 1 , satisfying the additional condition gcd ( x y , m n ) = 1 .

On uniform lower bound of the Galois images associated to elliptic curves

Keisuke Arai (2008)

Journal de Théorie des Nombres de Bordeaux

Let p be a prime and let K be a number field. Let ρ E , p : G K Aut ( T p E ) GL 2 ( p ) be the Galois representation given by the Galois action on the p -adic Tate module of an elliptic curve E over K . Serre showed that the image of ρ E , p is open if E has no complex multiplication. For an elliptic curve E over K whose j -invariant does not appear in an exceptional finite set (which is non-explicit however), we give an explicit uniform lower bound of the size of the image of ρ E , p .

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