Year: 2026
Type: preprint
Abstract: It is proved that there exists a language $L$ such that its $ω$-power has infinite rank in the difference hierarchy of open sets. The same holds for the decreasing difference hierarchy of $Π^0_2$ sets.
Source: arXiv (Cornell University)
Author: Vishnikin, Maxim
Language: English
Subfield: Computational Theory and Mathematics
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7220991104