Unfolding operators in fixed domains.- Advanced topics for unfolding.- Homogenization in fixed domains.- Unfolding operators in perforated domains.- Homogenization in perforated domains.- A Stokes problem in a partially porous medium.- Partial unfolding: a brief primer.- Oscillating boundaries.- Unfolding operators: the case of "small holes".- Homogenization in domains with "small holes".- Homogenization of an elastic thin plate.- The scale-splitting...