2 papers
math.AG2026
M-modules
Bernard Le Stum
We consider the ring M of column-finite matrices with integer coefficients. We prove that M-modules form an additive closed symmetric monoidal abelian category that essentially con…
math.AG2025
Absolute calculus and prismatic crystals on cyclotomic rings
Michel Gros, Bernard Le Stum, Adolfo Quirós +1
Let be a prime, the ring of Witt vectors of a perfect field of characteristic and a primitive th root of unity. We introduce a new notion of calculus over $W…