7 citations · 15 across the 13 of their papers we have counts for
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Wild Brauer classes via prismatic cohomology
Emiliano Ambrosi, Rachel Newton, Margherita Pagano
Let be a finite extension of and a smooth proper -variety with good reduction. Under a mild assumption on the behaviour of Hodge numbers under reduction m…
Topological groupoids with involution and real algebraic stacks
Emiliano Ambrosi, Olivier de Gaay Fortman
To a topological groupoid endowed with an involution, we associate a topological groupoid of fixed points, generalizing the fixed-point subspace of a topological space with involut…
On the topology of real algebraic stacks
Emiliano Ambrosi, Olivier de Gaay Fortman
Motivated by questions arising in the theory of moduli spaces in real algebraic geometry, we develop a range of methods to study the topology of the real locus of a Deligne-Mumford…
An Artin--Mumford criterion for conic bundles in characteristic two
Emiliano Ambrosi, Giuseppe Ancona
We prove a characteristic two version of the famous criterion of Artin and Mumford for irrationality of conic bundles. On the one hand, combined with the pathological behaviour of…
Reduction modulo of the Noether problem
Emiliano Ambrosi, Domenico Valloni
Let be a complete valuation ring of mixed characteristic with algebraically closed fraction field and residue field . Let be a smooth projective morphism.…
Betti numbers of real semistable degenerations via real logarithmic geometry
Emiliano Ambrosi, Matilde Manzaroli
Let be a totally real semistable degeneration over a smooth real curve with degenerate fiber . Assuming that the irreducible components of are simpl…
Specialization of Néron-Severi groups in positive characteristic
Emiliano Ambrosi
Let be an infinite finitely generated field of characteristic . Fix a separated scheme smooth, geometrically connected, and of finite type over and a smooth proper…
A note on the behaviour of the Tate conjecture under finitely generated field extensions
Emiliano Ambrosi
We show that the -adic Tate conjecture for divisors on smooth proper varieties over finitely generated fields of positive characteristic follows from the -adic Tate con…