2 papers
math.NT2025
The étale Brauer-Manin obstruction for classifying stacks
Ajneet Dhillon, Nicole Lemire, Jonathan Martin +1
We study the strong approximation for classifying stacks , where is a linear algebraic group over a number field . More specifically, we prove that the étale Brauer-Mani…
math.RA2023
Cohomology for Picard-Vessiot theory
Man Cheung Tsui, Yidi Wang
We introduce a cohomology theory that classifies differential objects that arise from Picard-Vessiot theory, using the differential Hopf-Galois descent. To do this, we provide an e…