i1 : X = specialGushelMukaiFourfold("cubic scroll",ZZ/65521); o1 : ProjectiveVariety, GM fourfold containing a surface of degree 3 and sectional genus 0 |
i2 : describe X o2 = Special Gushel-Mukai fourfold of discriminant 12 containing a surface in PP^8 of degree 3 and sectional genus 0 cut out by 7 hypersurfaces of degrees (1,1,1,1,2,2,2) and with class in G(1,4) given by 2*s_(3,1)+s_(2,2) Type: ordinary (case 7 of Table 1 in arXiv:2002.07026) |