clase 30: Esquemas proyectivos y sus puntos racionales. curso: GA Esquemas

New channel J. Rogelio Pérez Buendía: title sample judged 'whole' (An authentic university math professor's channel of full graduate-level course lectures and seminars, with only a handfu); passed a second screen for sellers/exam-prep/re-uploads; 2 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.