Sourayan Banerjee

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20232026

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math.AG2026

Relative Brauer groups and Kummer Sequence without characteristic constraint in $f pp f$ -topology

Sourayan Banerjee

Let $f : X \to S$ be a faithful affine map. In this article we construct a group homomorphism $θ_{fppf}: \text{Br}(f) \longrightarrow H^1_{fppf}\!\left(S, (f_*\mathcal{O}_X^\…

math.AG2026

Toolkit for the algebraic geometer

Sourayan Banerjee, Oliver Lorscheid, Alejandro Martínez Méndez +1

In this text, we outline a theory of schemes associated with a site, which generalizes a variety of geometries, such as manifolds, schemes, analytic spaces, simplicial complexes, a…

Relative Brauer groups and Kummer Sequence without characteristic constraint in fppf-topology

Toolkit for the algebraic geometer

Relative Brauer groups and Kummer Sequence without characteristic constraint in $f pp f$ -topology