map(CubicFourfold) -- associated cubic map

• Function: map

• Usage:

  map X

• Inputs:
  • X, a cubic fourfold, containing a surface $S\subset\mathbb{P}^5$
• Optional inputs:
  • Degree => ..., default value null,
  • DegreeLift => ..., default value null,
  • DegreeMap => ..., default value null,
• Outputs:
  • a rational map, the rational map from $\mathbb{P}^5$ defined by the linear system of cubics through $S$