Michal Korch | On the class of perfectly null sets and its transitive version

Whole-channel inclusion: INI Seminar Room 1 is an honest teaching channel (title sample + 3 transcripts read: All three samples lack transcripts, so the channel verdict relies on the prior title-sample assessment indicating genuine technical seminar content from the Isaac Newton Institute.); this title passed a strict title check (sonnet) after a labelling pass.