Skip to main content Accessibility help
×
Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-08T00:03:35.672Z Has data issue: false hasContentIssue false

5 - Some Applications of Sieves of Dimension exceeding 1

Published online by Cambridge University Press:  03 February 2010

G. R. H. Greaves
Affiliation:
University of Wales College of Cardiff
G. Harman
Affiliation:
University of Wales College of Cardiff
M. N. Huxley
Affiliation:
University of Wales College of Cardiff
Get access

Summary

We combine the sieves of [1], [2] with the weighted sieve procedure of [3], Chapter 10, to formulate a general theorem about the incidence of almost-primes in integer sequences; and we illustrate the quality of this machinery with many concrete results about almost-primes representable by polynomials with integer or prime arguments.

Chapter 10.1 of [3] describes a weighted sieve procedure which, in combination with upper and lower sieve estimates of dimension κ > 1, leads to a general result of the following kind: given a finite integer sequence A and a set P of primes, then subject only to some rather weak conditions on the pair A, P, one can assert that A contains a large number of almost-primes Pr — numbers having at most r prime factors counted according to multiplicity — with r relatively small, made up of primes from P. Since [3] is currently out of print and higher dimensional sieves superior to those described in Chapter 7 of [3] are now available (see [1], [2]), we state here an improved version of such a general result and describe various applications to integer sequences generated by reducible polynomials that are superior to those presented in Chapter 10.3 of [3].

Let A be a finite integer sequence whose members are not necessarily all positive or distinct.

Type
Chapter
Information
Publisher: Cambridge University Press
Print publication year: 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Save book to Kindle

To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×