The Iwasawa Invariants of Γ-Extensions of a Fixed Number Field

1973 ◽  
Vol 95 (1) ◽  
pp. 204 ◽  
Author(s):  
Ralph Greenberg
Keyword(s):  
Number Field ◽  
Fixed Number ◽  
Iwasawa Invariants

Generalised Iwasawa invariants and the growth of class numbers

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sören Kleine
Keyword(s):  
Number Field ◽  
Fixed Number ◽  
Class Numbers ◽  
Open Neighbourhood ◽  
Finitely Generated ◽  
Asymptotic Growth ◽  
Iwasawa Invariants ◽  
Locally Maximal ◽  
Global Boundedness ◽  
The Impact

AbstractWe study the generalised Iwasawa invariants of {\mathbb{Z}_{p}^{d}}-extensions of a fixed number field K. Based on an inequality between ranks of finitely generated torsion {\mathbb{Z}_{p}[\kern-2.133957pt[T_{1},\dots,T_{d}]\kern-2.133957pt]}-modules and their corresponding elementary modules, we prove that these invariants are locally maximal with respect to a suitable topology on the set of {\mathbb{Z}_{p}^{d}}-extensions of K, i.e., that the generalised Iwasawa invariants of a {\mathbb{Z}_{p}^{d}}-extension {\mathbb{K}} of K bound the invariants of all {\mathbb{Z}_{p}^{d}}-extensions of K in an open neighbourhood of {\mathbb{K}}. Moreover, we prove an asymptotic growth formula for the class numbers of the intermediate fields in certain {\mathbb{Z}_{p}^{2}}-extensions, which improves former results of Cuoco and Monsky. We also briefly discuss the impact of generalised Iwasawa invariants on the global boundedness of Iwasawa λ-invariants.

Bounding the Iwasawa invariants of Selmer groups

2020 ◽  
pp. 1-33
Author(s):  
Sören Kleine
Keyword(s):  
Number Field ◽  
Analogous Result ◽  
Abelian Varieties ◽  
Fixed Number ◽  
Selmer Groups ◽  
Iwasawa Invariants ◽  
Ordinary Reduction

Abstract We study the growth of p-primary Selmer groups of abelian varieties with good ordinary reduction at p in ${{Z}}_p$ -extensions of a fixed number field K. Proving that in many situations the knowledge of the Selmer groups in a sufficiently large number of finite layers of a ${{Z}}_p$ -extension over K suffices for bounding the over-all growth, we relate the Iwasawa invariants of Selmer groups in different ${{Z}}_p$ -extensions of K. As applications, we bound the growth of Mordell–Weil ranks and the growth of Tate-Shafarevich groups. Finally, we derive an analogous result on the growth of fine Selmer groups.

IWASAWA TYPE FORMULA FOR COVERS OF A LINK IN A RATIONAL HOMOLOGY SPHERE

2008 ◽  
Vol 17 (10) ◽  
pp. 1199-1221 ◽  
Author(s):  
TERUHISA KADOKAMI ◽  
YASUSHI MIZUSAWA
Keyword(s):  
Number Field ◽  
Class Number ◽  
Homology Sphere ◽  
Rational Homology ◽  
Homology Groups ◽  
Cyclic Covers ◽  
Class Number Formula ◽  
Number Formula ◽  
Iwasawa Invariants ◽  
Rational Homology Sphere

Based on the analogy between links and primes, we present an analogue of the Iwasawa's class number formula in a Zp-extension for the p-homology groups of pn-fold cyclic covers of a link in a rational homology 3-sphere. We also describe the associated Iwasawa invariants precisely for some examples and discuss analogies with the number field case.

Sur les invariants d'Iwasawa des tours cyclotomiques

2003 ◽  
Vol 46 (2) ◽  
pp. 178-190 ◽  
Author(s):  
Jean-François Jaulent ◽  
Christian Maire
Keyword(s):  
Number Field ◽  
Iwasawa Invariants

AbstractWe carry out the computation of the Iwasawa invariants associated to abelian T-ramified S-decomposed ℓ-extensions over the finite steps Kn of the cyclotomic -extension K∞/K of a number field of CM-type.

scholarly journals Average Frobenius distribution for elliptic curves defined over finite Galois extensions of the rationals

2011 ◽  
Vol 150 (3) ◽  
pp. 439-458 ◽  
Author(s):  
KEVIN JAMES ◽  
ETHAN SMITH
Keyword(s):  
Elliptic Curve ◽  
Elliptic Curves ◽  
Number Field ◽  
Fixed Number ◽  
Prime Ideals ◽  
Galois Extensions ◽  
Trace Of Frobenius

AbstractLet K be a fixed number field, assumed to be Galois over ℚ. Let r and f be fixed integers with f positive. Given an elliptic curve E, defined over K, we consider the problem of counting the number of degree f prime ideals of K with trace of Frobenius equal to r. Except in the case f = 2, we show that ‘on average,’ the number of such prime ideals with norm less than or equal to x satisfies an asymptotic identity that is in accordance with standard heuristics. This work is related to the classical Lang–Trotter conjecture and extends the work of several authors.

scholarly journals Level structures on abelian varieties and Vojta’s conjecture

2017 ◽  
Vol 153 (2) ◽  
pp. 373-394 ◽  
Author(s):  
Dan Abramovich ◽  
Anthony Várilly-Alvarado
Keyword(s):  
Positive Integer ◽  
Recent Work ◽  
Abelian Variety ◽  
Number Field ◽  
Abelian Varieties ◽  
Fixed Number ◽  
Vojta's Conjecture

Assuming Vojta’s conjecture, and building on recent work of the authors, we prove that, for a fixed number field $K$ and a positive integer $g$, there is an integer $m_{0}$ such that for any $m>m_{0}$ there is no principally polarized abelian variety $A/K$ of dimension $g$ with full level-$m$ structure. To this end, we develop a version of Vojta’s conjecture for Deligne–Mumford stacks, which we deduce from Vojta’s conjecture for schemes.

scholarly journals Rational Values of Weierstrass Zeta Functions

2015 ◽  
Vol 59 (4) ◽  
pp. 945-958 ◽  
Author(s):  
G. O. Jones ◽  
M. E. M. Thomas
Keyword(s):  
Zeta Function ◽  
Number Field ◽  
Zeta Functions ◽  
Fixed Number ◽  
The Other ◽  
Effective Constant

AbstractWe answer a question of Masser by showing that for the Weierstrass zeta function ζ corresponding to a given lattice Λ, the density of algebraic points of absolute multiplicative height bounded byTand degree bounded byklying on the graph of ζ, restricted to an appropriate domain, does not exceedc(logT)15for an effective constant c > 0 depending onkand on Λ. Using different methods, we also give two bounds of the same form for the density of algebraic points of bounded height in a fixed number field lying on the graph of ζ restricted to an appropriate subset of (0, 1). In one case the constant c can be shown not to depend on the choice of lattice; in the other, the exponent can be improved to 12.

K-STRATUM LIMIT AND K-STRATUM INTEGRAL ON THE GENERALIZED NUMBER FIELD

1982 ◽  
Vol 2 (4) ◽  
pp. 375-388
Author(s):  
Jiwu Wang ◽  
Tai Kang
Keyword(s):  
Number Field

Interactive multiobjective DEA target setting using lexicographic DDF

2020 ◽  
Vol 54 (6) ◽  
pp. 1703-1722 ◽  
Author(s):  
Narges Soltani ◽  
Sebastián Lozano
Keyword(s):  
Efficient Frontier ◽  
Directional Distance Function ◽  
Fixed Number ◽  
Optimization Approach ◽  
Target Setting ◽  
Interactive Process ◽  
Decision Making Unit ◽  
Setting Approach ◽  
Promising Area ◽  
Current Region

In this paper, a new interactive multiobjective target setting approach based on lexicographic directional distance function (DDF) method is proposed. Lexicographic DDF computes efficient targets along a specified directional vector. The interactive multiobjective optimization approach consists in several iteration cycles in each of which the Decision Making Unit (DMU) is presented a fixed number of efficient targets computed corresponding to different directional vectors. If the DMU finds one of them promising, the directional vectors tried in the next iteration are generated close to the promising one, thus focusing the exploration of the efficient frontier on the promising area. In any iteration the DMU may choose to finish the exploration of the current region and restart the process to probe a new region. The interactive process ends when the DMU finds its most preferred solution (MPS).

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