1. A cochain level proof of Adem relations in the mod 2 Steenrod algebra

   • Greg Brumfiel
   • Anibal Medina-Mardones
   • John Morgan

   OriginalPaper Open access 19 August 2021 Pages: 517 - 562

   

2. Quasi-categories vs. Segal spaces: Cartesian edition

   • Nima Rasekh

   OriginalPaper Open access 20 August 2021 Pages: 563 - 604

   

3. On the Maurer-Cartan simplicial set of a complete curved \(A_\infty \)-algebra

   • Niek de Kleijn
   • Felix Wierstra

   OriginalPaper Open access 25 September 2021 Pages: 605 - 633

4. Equivariant formal group laws and complex-oriented spectra over primary cyclic groups: elliptic curves, Barsotti–Tate groups, and other examples

   • Po Hu
   • Igor Kriz
   • Petr Somberg

   OriginalPaper 27 September 2021 Pages: 635 - 665

5. Rational model for the string coproduct of pure manifolds

   • Takahito Naito

   OriginalPaper 07 October 2021 Pages: 667 - 702

6. Sheaves via augmentations of Legendrian surfaces

   • Dan Rutherford
   • Michael Sullivan

   OriginalPaper 09 October 2021 Pages: 703 - 752

   

7. Overcategories and undercategories of cofibrantly generated model categories

   • Philip S. Hirschhorn

   OriginalPaper 13 October 2021 Pages: 753 - 768

8. On the LS-category and topological complexity of projective product spaces

   • Seher Fişekci
   • Lucile Vandembroucq

   OriginalPaper 08 November 2021 Pages: 769 - 780