5 citations · 10 across the 7 of their papers we have counts for
4 papers · 1 filter
Hopf formulae for cocommutative Hopf algebras
Marino Gran, Andrea Sciandra
The adjunction between coalgebras and Hopf algebras, first described by Takeuchi, allows one to prove that the semi-abelian category of cocommutative Hopf algebras has enough $\mat…
Double groupoids and -groupoids in regular Mal'tsev categories
Nadja Egner, Marino Gran
We prove that the category 2- of internal -groupoids is a Birkhoff subcategory of the category of double groupoids…
A characterization of central extensions in the variety of quandles
Valérian Even, Marino Gran, Andrea Montoli
The category of symmetric quandles is a Mal'tsev variety whose subvariety of abelian symmetric quandles is the category of abelian algebras. We give an algebraic description of the…
On the characterization of Jónsson-Tarski and of subtractive varieties
Marino Gran, Diana Rodelo
We investigate unital, subtractive and strongly unital regular categories with enough projectives and give characterizations of their projective covers. The categorical equation "s…