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Mar 6, 2019 at 15:44 comment added Igor Sikora Sorry, you are right - a multiplication and comultiplication should be morphisms of spectral sequences. Hopefully it makes sense now
Mar 6, 2019 at 15:32 comment added Denis Nardin How can they be both morphisms of Hopf algebras and (co?)derivations?
Mar 6, 2019 at 15:02 comment added Igor Sikora They are morphisms of Hopf algebras, and are derivations w.r.t. multiplication and the tensor product, as far as I understand.
Mar 5, 2019 at 21:44 comment added Denis Nardin How do the differentials interact with the Hopf algebra structure?
Mar 5, 2019 at 18:51 history asked Igor Sikora CC BY-SA 4.0