3 papers
math.AG2026
Coherent six-functor formalisms: Pro vs Solid
Fei Ren
In the classical theory for coherent sheaves, the only missing piece in the Grothendieck six-functor formalism picture is for an open immersion . Towards fixing this gap,…
math.CT2025
Structure theorems for the heart of LCA
Oliver Braunling, Fei Ren
Cohomology theories with values in LCA (locally compact abelian) groups suffer from the problem that the latter do not form an abelian category. However, the category LCA has a can…
math.AG2025
Structure theorem for log de Rham-Witt sheaves with vanishing
Fei Ren
We prove an elegant structure theorem for log de Rham-Witt sheaves with vanishing along an effective Cartier divisor defined in arXiv:2403.18763, answering a question of Shuji…