A k contact description of jet geometry, PDEs, and related techniques (Javier de Lucas)

New channel Prague Mathematical Physics Seminar: title sample judged 'whole' (A consistent archive of expert research seminar talks in mathematical physics, which counts as genuine educational techn); passed a second screen for sellers/exam-prep/re-uploads; 3 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.