Discrete Mean Estimates and the Landau-Siegel Zero: Appendix A. Some Euler Products

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Author:

(1) Yitang Zhang.

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Table of Links

Abstract & Introduction
Notation and outline of the proof
The set Ψ1
Zeros of L(s, ψ)L(s, χψ) in Ω
Some analytic lemmas
Approximate formula for L(s, ψ)
Mean value formula I
Evaluation of Ξ11
Evaluation of Ξ12
Proof of Proposition 2.4
Proof of Proposition 2.6
Evaluation of Ξ15
Approximation to Ξ14
Mean value formula II
Evaluation of Φ1
Evaluation of Φ2
Evaluation of Φ3
Proof of Proposition 2.5

Appendix A. Some Euler products

Appendix B. Some arithmetic sums

References

Appendix A. Some Euler Products

This appendix is devoted to proving Lemma 8.3, 15.2, 15.3, 16.1 and 16.2. For notational simplicity we shall write


Proof of Lemma 8.3. Note that


which are henceforth assumed. We discuss in three cases.


Case 1. (q, dh) = 1.


We have


It follows that


This together with the relations


yields (A.1).


Case 2. q|h.


We have


so that


This yields (A.3).


This completes the proof.


Proof of Lemma 16.1. For any q, r, d and l we have


Hence


and


On the other hand we have


It follows that


It is direct to verify that in either case the assertion holds.


Proof of Lemma 16.2. We give a sketch only. If dl = 1 and |s − 1| ≤ 5α, then


with


The assertion follows by discussing the cases χ(2) 6= 1 and χ(2) = 1 respectively

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This paper is available on arxiv under CC 4.0 license.

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