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math.AG2024
On the universal and generalized orbifold Euler characteristics
Sabir M. Gusein-Zade, Ignacio Luengo, Alejandro Melle-Hernández +1
We discuss the universal orbifold Euler characteristic and generalized orbifold Euler characteristics corresponding to finitely generated groups (the -Euler characteristics)…
math.AG2023
Grothendieck ring of pairs of quasi-projective varieties
Sabir M. Gusein-Zade, Ignacio Luengo, Alejandro Melle-Hernández
We define a Grothendieck ring of pairs of complex quasi-projective varieties (that is a variety and a subvariety). We describe -structures and a power structure on/over this rin…