All internal data of the input are included in the returned string.
i1 : phi = (specialCubicTransformation(2,ZZ/33331))!; o1 : RationalMap (cubic birational map from PP^3 to hypersurface in PP^4) |
i2 : str = toExternalString phi; |
i3 : #str o3 = 7432 |
i4 : time phi' = value str;
-- used 0.0133002 seconds
o4 : RationalMap (cubic birational map from PP^3 to hypersurface in PP^4)
|
i5 : time describe phi'
-- used 0.00464406 seconds
o5 = rational map defined by forms of degree 3
source variety: PP^3
target variety: smooth quadric hypersurface in PP^4
dominance: true
birationality: true (the inverse map is already calculated)
projective degrees: {1, 3, 4, 2}
number of minimal representatives: 1
dimension base locus: 1
degree base locus: 5
coefficient ring: ZZ/33331
|
i6 : time describe inverse phi'
-- used 0.0052128 seconds
o6 = rational map defined by forms of degree 2
source variety: smooth quadric hypersurface in PP^4
target variety: PP^3
dominance: true
birationality: true (the inverse map is already calculated)
projective degrees: {2, 4, 3, 1}
number of minimal representatives: 1
dimension base locus: 1
degree base locus: 5
coefficient ring: ZZ/33331
|