This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/19304
Description
Title
Nonstandard vector integrals and vector measures
Author(s)
Zimmer, G. Beate
Issue Date
1994
Doctoral Committee Chair(s)
Loeb, Peter A.
Department of Study
Mathematics
Discipline
Mathematics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Mathematics
Language
eng
Abstract
We describe an extension of the Bochner integral. Bochner integrable functions can be approximated by simple functions. Using Nonstandard Analysis, we investigate internal simple functions from an internal measure space to the nonstandard extension of a Banach space. We take suitable equivalence classes and identify the subspace of S-integrable functions with a space of functions from a Loeb space into the nonstandard hull of a Banach space. This space includes the Bochner integrable functions; it also includes nonmeasurable functions. For functions in this space we obtain an integral which generalizes the Bochner integral. For Banach lattices our integral coincides with an extension of the Bochner integral developed by Loeb and Osswald. We investigate the properties of the extended integral and characterize the space of extended integrable functions. The applications of this extended integral are mainly concerned with vector measures. One application is a generalized Radon-Nikodym derivative for all absolutely continuous vector measures of bounded variation.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
