On the $L^r$-differentiability of two Lusin classes and a full descriptive characterization of the $HK_r$-integral
- Авторлар: Musial P.1, Skvortsov V.A.2,3, Sworowski P.A.4, Tulone F.5
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Мекемелер:
- Chicago State University, Chicago, IL, USA
- Faculty of Mechanics and Mathematics, Lomonosov Moscow State University, Moscow, Russia
- Moscow Center of Fundamental and Applied Mathematics, Moscow, Russia
- Institute of Mathematics, Casimirus the Great University, Bydgoszcz, Poland
- University of Palermo, Palermo, Italy
- Шығарылым: Том 216, № 6 (2025)
- Беттер: 46-58
- Бөлім: Articles
- URL: https://journal-vniispk.ru/0368-8666/article/view/306712
- DOI: https://doi.org/10.4213/sm10129
- ID: 306712
Дәйексөз келтіру
Аннотация
It is proved that any function in a Lusin-type class, the class of $ACG_r$-functions, is differentiable almost everywhere in the sense of a derivative defined in the space $L^r$, $1\leqslant r < \infty$. This leads to a full descriptive characterization of a Henstock–Kurzweil-type integral, the $HK_r$-integral, which serves to recover functions from their $L^r$-derivatives. The class $ACG_r$ is compared with the classical Lusin class $ACG$, and it is shown that continuous $ACG$-functions can fail to be $L^r$-differentiable almost everywhere.
Негізгі сөздер
Авторлар туралы
Paul Musial
Chicago State University, Chicago, IL, USA
Хат алмасуға жауапты Автор.
Email: paul.musial@gmail.com
Valentin Skvortsov
Faculty of Mechanics and Mathematics, Lomonosov Moscow State University, Moscow, Russia; Moscow Center of Fundamental and Applied Mathematics, Moscow, Russia
Email: vaskvor2000@yahoo.com
Doctor of physico-mathematical sciences, Professor
Piotr Sworowski
Institute of Mathematics, Casimirus the Great University, Bydgoszcz, Poland
Email: piotrus@ukw.edu.pl
PhD, no status
Francesco Tulone
University of Palermo, Palermo, Italy
Email: francesco.tulone@unipa.it
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