2015/07/02 by Alberto Bellardini, Bellardini, Alberto
Mathematics · #Advanced Algebra and Geometry #Algebraic Geometry (math.AG) #Algebraic Geometry and Number Theory #FOS: Mathematics #Homotopy and Cohomology in Algebraic Topology #math.AG
paper · pdf · doi:10.48550/arxiv.1507.00506
Due to a mistake in the previous version many parts have been changed
openalex publication_date 2015/07/02 · arxiv created 2016/08/08 · arxiv updated 2016/08/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show that a particular subfunctor of the relative logarithmic Picard functor for families of aligned, log semistable curves over a regular base scheme and smooth over an open dense subscheme of the base is representable by a smooth algebraic space which is slightly more separated than the classical relative Picard functor. We show the existence of its maximal separated quotient and give a new functorial interpretation in terms of logarithmic geometry for the Néron model of the relative Picard functor of the smooth locus when we restrict to transversal pull backs from spectra of discrete valuation rings. We also show that aligned degenerations are log cohomologically flat.