14 citations · 51 across the 17 of their papers we have counts for
5 papers · 1 filter
Automorphisms of del Pezzo surfaces in characteristic 2
Igor Dolgachev, Gebhard Martin
We classify the automorphism groups of del Pezzo surfaces of degrees one and two over an algebraically closed field of characteristic two. This finishes the classification of autom…
The -arithmetic hyperbolic lattices, , in three dimensions
G. J. Martin, K. Salehi, Y. Yamashita
We identify the finitely many arithmetic lattices in the orientation preserving isometry group of hyperbolic -space generated by an element of order and a…
RDP del Pezzo surfaces with global vector fields in odd characteristic
Gebhard Martin, Claudia Stadlmayr
We classify RDP del Pezzo surfaces with global vector fields over arbitrary algebraically closed fields of characteristic . In characteristic , every RDP del Pezzo sur…
Enriques surfaces of non-degeneracy 3
Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani
We classify all non-extendable 3-sequences of half-fibers on Enriques surfaces. If the characteristic is different from 2, we prove in particular that every Enriques surface admits…
On extra-special Enriques surfaces
Gebhard Martin, Giacomo Mezzedimi, Davide Cesare Veniani
We refine Cossec and Dolgachev's classification of extra-special Enriques surfaces, providing a complete and concise proof.