2 papers
math.AG2016
The complexity of a flat groupoid
Matthieu Romagny, David Rydh, Gabriel Zalamansky
Grothendieck proved that any finite epimorphism of noetherian schemes factors into a finite sequence of effective epimorphisms. We define the complexity of a flat groupoid $R\right…
math.AG2016
Ramification of inseparable coverings of schemes and application to diagonalizable group actions
Gabriel Zalamansky
We define the notion of inseparable coverings of schemes and we propose a ramification formalism for them, along the lines of the classical one. Using this formalism we prove a for…