INDIVISIBILITY OF ORDERS OF SELMER GROUPS FOR MODULAR FORMS

2009 ◽  
Vol 05 (02) ◽  
pp. 271-280
Author(s):  
MASATAKA CHIDA
Keyword(s):  
Modular Forms ◽  
Selmer Groups ◽  
Quadratic Twists

In this paper, we consider indivisibility of orders of Selmer groups for modular forms under quadratic twists. Then, we will give a generalization of a theorem of James–Ono and Kohnen–Ono.

scholarly journals Iwasawa Theory of Elliptic Modular Forms Over Imaginary Quadratic Fields at Non-ordinary Primes

2019 ◽  
Author(s):  
Kâzım Büyükboduk ◽  
Antonio Lei
Keyword(s):  
Modular Form ◽  
Modular Forms ◽  
Quadratic Field ◽  
Euler System ◽  
Base Change ◽  
Iwasawa Theory ◽  
Imaginary Quadratic Field ◽  
Selmer Groups ◽  
Imaginary Quadratic Fields ◽  
Elliptic Modular Form

AbstractThis article is a continuation of our previous work [7] on the Iwasawa theory of an elliptic modular form over an imaginary quadratic field $K$, where the modular form in question was assumed to be ordinary at a fixed odd prime $p$. We formulate integral Iwasawa main conjectures at non-ordinary primes $p$ for suitable twists of the base change of a newform $f$ to an imaginary quadratic field $K$ where $p$ splits, over the cyclotomic ${\mathbb{Z}}_p$-extension, the anticyclotomic ${\mathbb{Z}}_p$-extensions (in both the definite and the indefinite cases) as well as the ${\mathbb{Z}}_p^2$-extension of $K$. In order to do so, we define Kobayashi–Sprung-style signed Coleman maps, which we use to introduce doubly signed Selmer groups. In the same spirit, we construct signed (integral) Beilinson–Flach elements (out of the collection of unbounded Beilinson–Flach elements of Loeffler–Zerbes), which we use to define doubly signed $p$-adic $L$-functions. The main conjecture then relates these two sets of objects. Furthermore, we show that the integral Beilinson–Flach elements form a locally restricted Euler system, which in turn allow us to deduce (under certain technical assumptions) one inclusion in each one of the four main conjectures we formulate here (which may be turned into equalities in favorable circumstances).

Algebraic functional equation for Hida family

2014 ◽  
Vol 10 (07) ◽  
pp. 1649-1674
Author(s):  
Somnath Jha ◽  
Aprameyo Pal
Keyword(s):  
Functional Equation ◽  
Number Field ◽  
Modular Forms ◽  
Euler System ◽  
Selmer Groups ◽  
Selmer Group ◽  
Main Conjecture ◽  
Hida Family ◽  
General Number ◽  
The Individual

We prove a functional equation for the characteristic ideal of the "big" Selmer group 𝒳(𝒯ℱ/F cyc ) associated to an ordinary Hida family of elliptic modular forms over the cyclotomic ℤp extension of a general number field F, under the assumption that there is at least one arithmetic specialization whose Selmer group is torsion over its Iwasawa algebra. For a general number field, the two-variable cyclotomic Iwasawa main conjecture for ordinary Hida family is not proved and this can be thought of as an evidence to the validity of the Iwasawa main conjecture. The central idea of the proof is to prove a variant of the result of Perrin-Riou [Groupes de Selmer et accouplements; cas particulier des courbes elliptiques, Doc. Math.2003 (2003) 725–760, Extra Volume: Kazuya Kato's fiftieth birthday] by constructing a generalized pairing on the individual Selmer groups corresponding to the arithmetic points and make use of the appropriate specialization techniques of Ochiai [Euler system for Galois deformations, Ann. Inst. Fourier (Grenoble)55(1) (2005) 113–146].

scholarly journals Selmer groups of quadratic twists of elliptic curves

1999 ◽  
Vol 314 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Kevin James ◽  
Ken Ono
Keyword(s):  
Elliptic Curves ◽  
Selmer Groups ◽  
Quadratic Twists

scholarly journals Iwasawa theory for modular forms at supersingular primes

2011 ◽  
Vol 147 (3) ◽  
pp. 803-838 ◽  
Author(s):  
Antonio Lei
Keyword(s):  
Elliptic Curves ◽  
Modular Forms ◽  
Iwasawa Theory ◽  
Selmer Groups ◽  
Main Conjecture ◽  
Supersingular Primes

AbstractWe generalise works of Kobayashi to give a formulation of the Iwasawa main conjecture for modular forms at supersingular primes. In particular, we give analogous definitions of the plus and minus Coleman maps for normalised new forms of arbitrary weights and relate Pollack’s p-adic L-functions to the plus and minus Selmer groups. In addition, by generalising works of Pollack and Rubin on CM elliptic curves, we prove the ‘main conjecture’ for CM modular forms.

scholarly journals Distribution of Selmer groups of quadratic twists of a family of elliptic curves

2008 ◽  
Vol 219 (2) ◽  
pp. 523-553 ◽  
Author(s):  
Maosheng Xiong ◽  
Alexandru Zaharescu
Keyword(s):  
Elliptic Curves ◽  
Selmer Groups ◽  
Quadratic Twists

scholarly journals ON SHIMURA'S DECOMPOSITION

2013 ◽  
Vol 09 (06) ◽  
pp. 1431-1445 ◽  
Author(s):  
SOMA PURKAIT
Keyword(s):  
Modular Forms ◽  
Theta Series ◽  
Dirichlet Character ◽  
Practical Applications ◽  
Quadratic Twists ◽  
Half Integral Weight ◽  
Integral Weight ◽  
Sum Formula ◽  
Practical Algorithm ◽  
Definition Of

Let k be an odd integer ≥ 3 and N be a positive integer such that 4|N. Let χ be an even Dirichlet character modulo N. Shimura decomposes the space of half-integral weight cusp forms Sk/2(N,χ) as a direct sum [Formula: see text] where F runs through all newforms of weight k - 1, level dividing N/2 and character χ2, the space Sk/2(N,χ,F) is the subspace of forms that are "Shimura equivalent" to F, and the space S0(N,χ) is the subspace spanned by single-variable theta-series. The explicit computation of this decomposition is important for practical applications of a theorem of Waldspurger relating the critical values of L-functions of quadratic twists of newforms of even integral weight to coefficients of modular forms of half-integral weight. In this paper, we give a more precise definition of the summands Sk/2(N,χ,F) whilst proving that it is equivalent to Shimura's definition. We use our definition to give a practical algorithm for computing Shimura's decomposition, and illustrate this with some examples.

scholarly journals Irreducibility of limits of Galois representations of Saito–Kurokawa type

2021 ◽  
Vol 7 (3) ◽  
Author(s):  
Tobias Berger ◽  
Krzysztof Klosin
Keyword(s):  
Modular Form ◽  
Modular Forms ◽  
Galois Representations ◽  
Siegel Modular Forms ◽  
Selmer Groups ◽  
Two Dimensional ◽  
Elliptic Modular Form

AbstractWe prove (under certain assumptions) the irreducibility of the limit $$\sigma _2$$ σ 2 of a sequence of irreducible essentially self-dual Galois representations $$\sigma _k: G_{{\mathbf {Q}}} \rightarrow {{\,\mathrm{GL}\,}}_4(\overline{{\mathbf {Q}}}_p)$$ σ k : G Q → GL 4 ( Q ¯ p ) (as k approaches 2 in a p-adic sense) which mod p reduce (after semi-simplifying) to $$1 \oplus \rho \oplus \chi $$ 1 ⊕ ρ ⊕ χ with $$\rho $$ ρ irreducible, two-dimensional of determinant $$\chi $$ χ , where $$\chi $$ χ is the mod p cyclotomic character. More precisely, we assume that $$\sigma _k$$ σ k are crystalline (with a particular choice of weights) and Siegel-ordinary at p. Such representations arise in the study of p-adic families of Siegel modular forms and properties of their limits as $$k\rightarrow 2$$ k → 2 appear to be important in the context of the Paramodular Conjecture. The result is deduced from the finiteness of two Selmer groups whose order is controlled by p-adic L-values of an elliptic modular form (giving rise to $$\rho $$ ρ ) which we assume are non-zero.

ON THE 2-ADIC IWASAWA INVARIANTS OF ORDINARY ELLIPTIC CURVES

2008 ◽  
Vol 04 (03) ◽  
pp. 403-422
Author(s):  
KAZUO MATSUNO
Keyword(s):  
Elliptic Curves ◽  
Explicit Formula ◽  
Selmer Groups ◽  
Quadratic Twists ◽  
Iwasawa Invariants

In this paper, we give an explicit formula describing the variation of the 2-adic Iwasawa λ-invariants attached to the Selmer groups of elliptic curves under quadratic twists. To prove this formula, we extend some results known for odd primes p, an analogue of Kida's formula proved by Hachimori and the author and a formula given by Greenberg and Vatsal, to the case where p = 2.

EULER CHARACTERISTIC OF Λ-ADIC FORMS OVER KUMMER EXTENSIONS

2014 ◽  
Vol 10 (02) ◽  
pp. 401-419 ◽  
Author(s):  
SUDHANSHU SHEKHAR
Keyword(s):  
Euler Characteristic ◽  
Modular Forms ◽  
Galois Representations ◽  
Rational Numbers ◽  
Selmer Groups

In this paper we compute the Euler characteristic of the Selmer groups associated to modular forms over certain Kummer extensions of the field of rational numbers. We also discuss the Euler characteristic of Λ-adic deformations of Galois representations associated to modular forms.

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