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Algebraic number fields, Algebraic integers, Arithmetic Geometry, Elliptic Curves, Function fields, Local fields, Arithmetic groups, Automorphic forms, zeta functions, $L$-functions, Quadratic forms, Quaternion algebras, Homogenous forms, Class groups, Units, Galois theory, Group cohomology, Étale cohomology, Motives, Class field theory, Iwasawa theory, Modular curves, Shimura varieties, Jacobian varieties, Moduli spaces

3
votes
1answer
Let $f\in S_k(\Gamma_1(N))$ be an eigenform, and $K_f$ be its number field, which is of finite degree over $\mathbb{Q}$. Consider the following statements. 1, $[K_f:\mathbb{Q}]=\#\{$Galois conjugates …
asked Oct 19 '15 by user42690
0
votes
It seems that proof of the statement 1 is quite trivial. Indeed the $G_\mathbb{Q}$ acts on Galois conjugates of $f$ transitively and the kernel is exactly the subgroup fixing $K_f$ by definition. It …
answered Oct 19 '15 by user42690
4
votes
1answer
let $K$ be a number field of degree $d$ over $\mathbb{Q}$), Let $\mathcal{O}\subset K $ be an order (i.e. a $\mathbb{Z}$-lattice of $K$ contained in the integer ring $\mathcal{O}_K$ of $K$). If $ \ma …
asked Oct 21 '15 by user42690
2
votes
1answer
For a given infinite set of primes, not too big, eg, satisfying Lang-Trotter conjecture, can we always find an E.C. with supersingular reduction (at least) at these primes? How about E.C. without CM? …
asked Nov 24 '13 by user42690
3
votes
2answers
Elkies proved The existence of infinitely many supersingular primes for every elliptic curve over Q. I read his paper, but found the supersingular primes he constructed are all 3(mod 4) type. So, how …
asked Nov 23 '13 by user42690