Identify whether abstract intertwined limiting processes are limits of the finite processes

Determine whether the limiting process constructed abstractly by the Borodin–Olshanski intertwining framework is a scaling limit of the corresponding family of finite intertwined Markov processes.

Background

The paper discusses families of Markov processes linked by intertwining relations and the Borodin–Olshanski construction of a process on a natural limiting space. That construction establishes existence under suitable hypotheses, but it is abstract and does not by itself identify the limiting process as the limit of the finite-level processes.

The authors’ framework proves convergence for the particular families treated in the paper, while noting that the analogous convergence question remains unresolved in the more general Borodin–Olshanski setting.

References

It seems reasonable to expect this process to be some limit of the $ { Y_n } $, but this is still unknown, particularly because the construction of this process on the limiting space is abstract.

Up-down chains and scaling limits: application to permuton- and graphon-valued diffusions  (2512.20338 - Féray et al., 23 Dec 2025) in Section 1, subsection “Related literature,” paragraph on intertwined processes