Endre Szemerédi: Maximum size of a set of integers

Picked one by one from a mixed channel. Transcript check: both title readers certain; 5 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only full-length mathematical research talks and lecture courses, typically titled 'Speaker Name: Talk Title' or 'Talk Title - Lecture N'. Exclude interviews, round tables, testimonials, institutional/promotional clips and short general-audience features.