Funding for this research was provided by:
National Research Foundation (145688, 118513)
National Research Foundation (127364, DSI-NRF Centre of Excellence in Mathematical and Statistical Sciences (Grant Number 2024-030-OPA))
Magnus Ehrnroothin Säätiö
Article History
Received: 25 September 2024
Revised: 18 September 2025
Accepted: 23 September 2025
First Online: 15 October 2025
Declarations
:
: The third author is a member of the Editorial Board of Integral Equations and Operator Theory.
: Not applicable.