Density of prime divisors of linear recurrences / Christian Ballot.

Format:

Book

Author/Creator:

Ballot, Christian, 1961- author.

Series:

Memoirs of the American Mathematical Society ; Number 551.

Memoirs of the American Mathematical Society, 0065-9266 ; Number 551

Language:

English

Subjects (All):

Numbers, Prime.

Divisor theory.

Recurrent sequences (Mathematics).

Physical Description:

1 online resource (117 p.)

Edition:

1st ed.

Place of Publication:

Providence, Rhode Island : American Mathematical Society, 1995.

Language Note:

English

Summary:

A result due to Hasse says that, on average, 17 out of 24 consecutive primes will divide a number in the sequence U[n = 2]n + 1. There are few sequences of integers for which this relative density can be computed exactly. In this work, Ballot links Hasse's method to the concept of the group associated with the set of second-order recurring sequences having the same characteristic polynomial and to the concept of the rank of prime division in a Lucas sequence. This combination of methods and ideas allows the establishment of new density results. Ballot also shows that this synthesis can be generalized to recurring sequences of any order, for which he also obtains new density results. All the results can be shown to be in close agreement with the densities computed using only a small set of primes. This well-written book is fairly elementary in nature and requires only some background in Galois theory and algebraic number theory.

Contents:

""CONTENTS""; ""ABSTRACT""; ""INTRODUCTION""; ""CHAPTER 1 GENERAL PRELIMINARIES""; ""CHAPTER 2 BACKGROUND MATERIAL""; ""Â1. Lucas Sequences. Rank. Laws of Apparition and Repetition""; ""Â2. Some Results of Laxton. The Laxton Group""; ""Â3. Hasse's Method and Lagarias' Contribution""; ""Â4. Some Observations and Open Questions""; ""CHAPTER 3 MORE ABOUT RECURRING SEQUENCES OF ORDER TWO""; ""Â1. Densities of Companion Sequences in the Reducible Case""; ""Â2. Density of Divisors of Cq(Î?1,Î?2)""; ""CHAPTER 4 A STUDY OF THE CUBIC CASE""; ""Â1. Preliminaries""

""REFERENCES""

Notes:

"May 1995, Volume 115, number 551 (third of 5 numbers)."

Includes bibliographical references.

Description based on print version record.

ISBN:

1-4704-0130-4