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math.KT2019
Extensions of filtered Ogus structures
Bruno Chiarellotto, Nicola Mazzari
We compute the Ext group of the (filtered) Ogus category over a number field . In particular we prove that the filtered Ogus realisation of mixed motives is not fully faithful.
math.KT2012★ 12 cited
The rigid syntomic ring spectrum
Frédéric Déglise, Nicola Mazzari
The aim of this paper is to show that Besser syntomic cohomology is representable by a rational ring spectrum in the motivic homotopical sense. In fact, extending previous construc…