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math.AG2023
On blended extensions in filtered abelian categories and motives with maximal unipotent radicals
Payman Eskandari
Grothendieck's theory of blended extensions (extensions panachées) gives a natural framework to study 3-step filtrations in abelian categories. We give a generalization of this the…
math.AG2023★ 1 cited
On endomorphisms of extensions in Tannakian categories
Payman Eskandari
We prove some analogues of Schur's lemma for endomorphisms of extensions in Tannakian categories. More precisely, let be a neutral Tannakian category over a field of c…