In spring 2021, Søren Galatius, Oscar Randal-Williams, and I organised an Oberwolfach seminar on the following series of four papers:

  • Søren Galatius, Alexander Kupers, and Oscar Randal-Williams , “Cellular Ek-algebras“. arXiv
  • Søren Galatius, Alexander Kupers, and Oscar Randal-Williams. “E2-cells and mapping class groups”. Publ. Math. Inst. Hautes Études Sci. 130 (2019), pp. 1–61. journal, arXiv
  • Søren Galatius, Alexander Kupers, Oscar Randal-Williams, “E∞-cells and general linear groups of finite fields“. arXiv
  • Søren Galatius, Alexander Kupers, and Oscar Randal-Williams, “E∞-cells and general linear groups of infinite fields“.  arXiv

You can find the lecture notes here.