Lecture 2 . Hopf Algebras and Combinatorics (Federico Ardila)

From a channel Lumen includes in full: This is a university mathematics professor's archive of full graduate-level course lectures (polytopes, enumerative combinatorics, matroids, Coxeter groups, Hopf algebras, combinatorial commutative algebra). Every sampled transcript is chalkboard teaching of definitions, theorems and worked examples. Titles are plain and descriptive, with no entertainment or promotional content. The only likely non-teaching uploads are administrative 'Lecture 0' sessions and possibly a stray non-lecture video, which the title patterns catch.

A 76-minute video from Federico Ardila's catalogue; the title names its topic.

Video by Federico Ardila, played through YouTube's embedded player.