Cremona : Table of Contents

Cremona  package for some computations on rational maps between projective varieties









degreeMap  degree of a rational map between projective varieties









forceImage  declare which is the image of a rational map

forceInverseMap  declare that two rational maps are one the inverse of the other

graph  closure of the graph of a rational map










isInverseMap  checks whether a rational map is the inverse of another



isMorphism  whether a rational map is a morphism



MathMode  whether to ensure correctness of output



parametrize  parametrization of linear varieties and hyperquadrics

point  pick a random rational point on a projective variety

projectiveDegrees  projective degrees of a rational map between projective varieties



RationalMap  the class of all rational maps between absolutely irreducible projective varieties over a field















SegreClass  Segre class of a closed subscheme of a projective variety









toMap  rational map defined by a linear system