Cohen-Macaulayness of absolute integral closures

B Bhatt - arXiv preprint arXiv:2008.08070, 2020 - arxiv.org
We prove that, modulo any power of a prime $ p $, the absolute integral closure of an
excellent noetherian domain is Cohen-Macaulay. A graded analog is also established …

Test ideals in mixed characteristic: a unified theory up to perturbation

B Bhatt, L Ma, Z Patakfalvi, K Schwede… - arXiv preprint arXiv …, 2024 - arxiv.org
Let $ X $ be an integral scheme of finite type over a complete DVR of mixed characteristic.
We provide a definition of a test ideal which agrees with the multiplier ideal after inverting …

Uniform bounds on symbolic powers in regular rings

T Murayama - arXiv preprint arXiv:2111.06049, 2021 - arxiv.org
We prove a uniform bound on the growth of symbolic powers of arbitrary (not necessarily
radical) ideals in arbitrary (not necessarily excellent) regular rings of all characteristics. This …

Algebraic geometry in mixed characteristic

B Bhatt - Plenary LectureS, 2022 - ems.press
Algebraic geometry in mixed characteristic Page 1 Algebraic geometry in mixed characteristic
Bhargav Bhatt Abstract Fix a prime number p. We report on some recent developments in …

The Brian\c {c} on-Skoda Theorem via weak functoriality of big Cohen-Macaulay algebras

S Rodríguez-Villalobos, K Schwede - arXiv preprint arXiv:2406.02433, 2024 - arxiv.org
We prove that, given a sufficiently functorial assignment from rings to big Cohen-Macaulay
algebras $ R\mapsto B $, that the associated big Cohen-Macaulay closure operation on …

On the effective generation of direct images of pluricanonical bundles in mixed characteristic

H Onuki - arXiv preprint arXiv:2403.16259, 2024 - arxiv.org
We present an effective global generation result for direct images of pluricanonical bundles
in mixed characteristic. This is a mixed characteristic analog of Ejiri's theorem in positive …

On the non-archimedean Monge-Amp\ere equation in mixed characteristic

Y Fang, W Gubler, K Künnemann - arXiv preprint arXiv:2203.12282, 2022 - arxiv.org
Let X be a smooth projective variety over a complete discretely valued field of mixed
characteristic. We solve non-archimedean Monge-Amp\ere equations on X assuming …

BCM-thresholds of hypersurfaces

S Rodríguez-Villalobos - arXiv preprint arXiv:2404.07438, 2024 - arxiv.org
In this paper, we use big Cohen-Macaulay algebras to define a characteristic free analog of
the $ F $-thresholds, which we call BCM-thresholds, in the case of principal ideals. We prove …

Closure-theoretic proofs of uniform bounds on symbolic powers in regular rings

T Murayama - arXiv preprint arXiv:2205.01153, 2022 - arxiv.org
We give short, closure-theoretic proofs for uniform bounds on the growth of symbolic powers
of ideals in regular rings. The author recently proved these bounds in mixed characteristic …

[PDF][PDF] < Posters> On Fujita's freeness conjecture in mixed characteristic

H Onuki - 代数幾何学シンポジウム記録, 2024 - repository.kulib.kyoto-u.ac.jp
Although Kodaira vanishing is only available in characteristic zero, Bhatt [BM+ 23] proved a
Kodaira-type vanishing theorem “up to finite covers”. Bhatt's vanishing theorem is employed …