Space tilings with congruent polyhedra (Lecture 5)

Лекция 2 курс по многогранникам. Независимый Университет, зима 2021. https://www.math.ucla.edu/~pak/courses/IUM-Winter-2021/IUM-Winter-2021 This is Lecture 5 of my 6-lecture course on polytopes (in Russian), IUM (Winter 2021)