Showing math.AGShow all
2 papers · 1 filter
math.AG2026
The essential and Cremona dimensions of a group
Igor Dolgachev
The Cremona dimension of a group is the minimal such that is isomorphic to a subgroup of the Cremona group of birational transformations of an -dimensional rational…
math.AG2024
Lagrangian tens of planes, Enriques surfaces and holomorphic symplectic fourfolds
Igor Dolgachev, Dimitri Markushevich
The Fano models of Enriques surfaces produce a family of tens of mutually intersecting planes in with a -dimensional moduli space. The latter is linked to several…