Fourier Theory on Groups

Picked one by one from a mixed channel. Transcript check: both title readers certain; 4 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only the channel's lecture-style math teaching videos (series such as Who Gives a Sheaf, Introduction to Number Theory, Introduction to Projective Geometry, Axiomatic Set Theory, Geometric Impossibilities, Demystifying the Golden Ratio, and standalone topic lectures or worked proofs like p-adic analysis, Haar measures, metric space boundaries and trigonometric limits). Exclude commentary, vlogs, members/update videos, recommendation lists, interviews, and caps-clickbait titles.