3 papers
math.NT2026
Modular variants of p-adic fundamental sequence
Heng Du, Qingyuan Jiang, Yucheng Liu
In this article, we relate any Farey triangle in the extended upper half-plane to a variant of Colmez--Fontaine's fundamental lemma in -adic Hodge theory. In particular, their o…
math.NT2026
A log prismatic-crystalline comparison theorem
Heng Du, Yong Suk Moon, Koji Shimizu
We show a comparison theorem between log prismatic cohomology and log crystalline cohomology for a -adic formal scheme with semistable reduction. Combined with the prismatic-éta…
math.NT2026
On log crystalline higher direct image
Heng Du, Yong Suk Moon, Koji Shimizu
We define the big crystalline site for a log scheme and prove the basic properties. In particular, we show the boundedness, base change, and perfectness theorems for the crystallin…